Zara Phillips taking part in The Gloucestershire Festival of Polo at Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Zara Phillips taking part in the Gloucestershire Festival of Polo at Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

Zara Phillips taking part in the Gloucestershire Festival of Polo at Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

(L-R) Victoria Pendleton and Zara Phillips take part in the Gloucestershire Festival of Polo at Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

Zara Phillips taking part in the Gloucestershire Festival of Polo at Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Zara Phillips taking part in the Gloucestershire Festival of Polo at Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

Zara Phillips taking part in the Gloucestershire Festival of Polo at Beaufort Polo Club on June 19, 2016 in Tetbury, England.

 Zara Phillips taking part in the Gloucestershire Festival of Polo at Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Zara Phillips taking part in the Gloucestershire Festival of Polo at Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

Zara Phillips taking part in the Gloucestershire Festival of Polo at Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

Victoria Pendleton and Zara Phillips (R) take part in the Gloucestershire Festival of Polo at Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Zara Phillips taking part in the Gloucestershire Festival of Polo at Beaufort Polo Club on June 19, 2016 in Tetbury, England.

 Zara Phillips taking part in the Gloucestershire Festival of Polo at Beaufort Polo Club on June 19, 2016 in Tetbury, England.

(L-R) Victoria Pendleton and Zara Phillips take part in the Gloucestershire Festival of Polo at Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

Zara Phillips taking part in the Gloucestershire Festival of Polo at Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Zara Phillips taking part in the Gloucestershire Festival of Polo at Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Zara Phillips and Princess Anne, Princess Royal during the Gloucestershire Festival of Polo at Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

Zara Phillips taking part in the Gloucestershire Festival of Polo at Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

 Zara Phillips and Princess Anne, Princess Royal during the Gloucestershire Festival of Polo at Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

Zara Phillips taking part in the Gloucestershire Festival of Polo at Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Mike Tindall plays with daughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Princess Anne, The Princess Royal plays with granddaughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Princess Anne, The Princess Royal plays with granddaughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Zara Phillips plays in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Mia Tindall watches her mother Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

AP McCoy and Princess Anne, The Princess Royal attend a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Mia Tindall watches her mother Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.



 Princess Anne, The Princess Royal plays with granddaughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

Princess Anne, The Princess Royal plays with granddaughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Princess Anne, The Princess Royal plays with granddaughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Mike Tindall plays with daughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Mike Tindall plays with daughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Mia Tindall watches her mother Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Princess Anne, The Princess Royal plays with granddaughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

Mia Tindall watches her mother Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

AP McCoy and Zara Phillips tussle as they play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Amy Williams, Mike Tindall and Mia Tindall watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

AP McCoy and Zara Phillips tussle as they play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Mia Tindall watches her mother Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Princess Anne, The Princess Royal plays with granddaughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

Princess Anne, The Princess Royal plays with granddaughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Princess Anne, The Princess Royal, Mike Tindall, Mia Tindall and AP McCoy watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Princess Anne, The Princess Royal plays with granddaughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Princess Anne, The Princess Royal plays with granddaughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

rincess Anne, The Princess Royal plays with granddaughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

Mike Tindall and daughter Mia Tindall watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Princess Anne, The Princess Royal plays with granddaughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

Mike Tindall plays with daughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Princess Anne, The Princess Royal plays with granddaughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Princess Anne, The Princess Royal plays with granddaughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

Mia Tindall watches her mother Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Princess Anne, The Princess Royal plays with granddaughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

Princess Anne, The Princess Royal plays with granddaughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

Princess Anne, The Princess Royal plays with granddaughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

Mike Tindall plays with daughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

 Mia Tindall watches her mother Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England

Zara Phillips plays in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Mike Tindall plays with daughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

Zara Phillips and Princess Anne, The Princess Royal attend a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

Princess Anne, The Princess Royal plays with granddaughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

Princess Anne, The Princess Royal kisses granddaughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Mia Tindall watches her mother Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Zara Phillips plays in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

 Zara Phillips plays in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Mia Tindall watches her mother Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Amy Williams, Mike Tindall and Mia Tindall watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Princess Anne, The Princess Royal plays with granddaughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

Mike Tindall plays with daughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Mia Tindall watches plays with her grandmother Princess Anne, as they watch her mother Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

AP McCoy and Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Mia Tindall watches her mother Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Princess Anne, The Princess Royal plays with granddaughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

Mike Tindall plays with daughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Amy Williams, Mike Tindall and Mia Tindall watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Mia Tindall watches her mother Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Mia Tindall watches her mother Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

Zara Phillips plays in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England. 

Mia Tindall plays as she watches her mother Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Mia Tindall watches her mother Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Princess Anne, The Princess Royal plays with granddaughter Mia Tindall as they watch Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

Zara Phillips plays in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.

AP McCoy and Zara Phillips play in a Jockeys vs Olympians charity polo match at the Beaufort Polo Club on June 19, 2016 in Tetbury, England.