Image licensed to i-Images Picture Agency. 14/07/2019. London, United Kingdom. The Duke and Duchess of Cambridge watching the Men's singles Final on the last day of the Wimbledon Tennis Championships in London. Picture by Stephen Lock / i-Images

Image licensed to i-Images Picture Agency. 14/07/2019. London, United Kingdom. The Duke and Duchess of Cambridge watching the Men's singles Final on the last day of the Wimbledon Tennis Championships in London. Picture by Stephen Lock / i-Images

Image licensed to i-Images Picture Agency. 14/07/2019. London, United Kingdom. The Duke and Duchess of Cambridge watching the Men's singles Final on the last day of the Wimbledon Tennis Championships in London. Picture by Stephen Lock / i-Images

Image licensed to i-Images Picture Agency. 14/07/2019. London, United Kingdom. The Duke and Duchess of Cambridge watching the Men's singles Final on the last day of the Wimbledon Tennis Championships in London. Picture by Stephen Lock / i-Images

Image licensed to i-Images Picture Agency. 14/07/2019. London, United Kingdom. The Duke and Duchess of Cambridge watching the Men's singles Final on the last day of the Wimbledon Tennis Championships in London. Picture by Stephen Lock / i-Images

Image licensed to i-Images Picture Agency. 14/07/2019. London, United Kingdom. The Duke and Duchess of Cambridge watching the Men's singles Final on the last day of the Wimbledon Tennis Championships in London. Picture by Stephen Lock / i-Images

Image licensed to i-Images Picture Agency. 14/07/2019. London, United Kingdom. The Duke and Duchess of Cambridge watching the Men's singles Final on the last day of the Wimbledon Tennis Championships in London. Picture by Stephen Lock / i-Images

Image licensed to i-Images Picture Agency. 14/07/2019. London, United Kingdom. The Duke and Duchess of Cambridge watching the Men's singles Final on the last day of the Wimbledon Tennis Championships in London. Picture by Stephen Lock / i-Images

LONDON, ENGLAND - JULY 14: The Duchess of Cambridge (L) and The Duke of Cambridge (R) watch the centre court during mens singles finals of the Wimbledon Tennis Championships 2019 on on Day 13 held at the All England Lawn Tennis and Croquet Club on July 14, 2019 in London, United Kingdom Ray Tang / Anadolu Agency/ABACAPRESS.COM

LONDON, ENGLAND - JULY 14: The Duchess of Cambridge (L) and The Duke of Cambridge (R) watch the centre court during mens singles finals of the Wimbledon Tennis Championships 2019 on on Day 13 held at the All England Lawn Tennis and Croquet Club on July 14, 2019 in London, United Kingdom Ray Tang / Anadolu Agency/ABACAPRESS.COM

Image licensed to i-Images Picture Agency. 14/07/2019. London, United Kingdom. The Duke and Duchess of Cambridge watching the Men's singles Final on the last day of the Wimbledon Tennis Championships in London. Picture by Stephen Lock / i-Images

Image licensed to i-Images Picture Agency. 14/07/2019. London, United Kingdom. The Duke and Duchess of Cambridge watching the Men's singles Final on the last day of the Wimbledon Tennis Championships in London. Picture by Stephen Lock / i-Images

Image licensed to i-Images Picture Agency. 14/07/2019. London, United Kingdom. The Duke and Duchess of Cambridge watching the Men's singles Final on the last day of the Wimbledon Tennis Championships in London. Picture by Stephen Lock / i-Images

Image licensed to i-Images Picture Agency. 14/07/2019. London, United Kingdom. The Duke and Duchess of Cambridge watching the Men's singles Final on the last day of the Wimbledon Tennis Championships in London. Picture by Stephen Lock / i-Images

Image licensed to i-Images Picture Agency. 14/07/2019. London, United Kingdom. The Duke and Duchess of Cambridge applaud after Novak Djokovic wins the Men's singles Final on the last day of the Wimbledon Tennis Championships in London. Picture by Stephen Lock / i-Images

Novak Djokovic win the Men's Singles Final Wimbledon Championships 2019, Men's Final - Day Thirteen. 14 Jul 2019 Pictured: The Duchess and Duke of Cambridge, Kate and William Wimbledon Championships 2019, Men's Final - Day Thirteen TM/EXPRESS SYNDICATION +44 (0)20 8612 7903/7661 +44 (0)20 7098 2764. Photo credit: Express Syndication / MEGA TheMegaAgency.com +1 888 505 6342

Novak Djokovic win the Men's Singles Final Wimbledon Championships 2019, Men's Final - Day Thirteen. 14 Jul 2019 Pictured: The Duchess and Duke of Cambridge, Kate and William Wimbledon Championships 2019, Men's Final - Day Thirteen TM/EXPRESS SYNDICATION +44 (0)20 8612 7903/7661 +44 (0)20 7098 2764. Photo credit: Express Syndication / MEGA TheMegaAgency.com +1 888 505 6342

Novak Djokovic win the Men's Singles Final Wimbledon Championships 2019, Men's Final - Day Thirteen. 14 Jul 2019 Pictured: Catherine, Duchess of Cambridge Wimbledon Championships 2019, Men's Final - Day Thirteen TM/EXPRESS SYNDICATION +44 (0)20 8612 7903/7661 +44 (0)20 7098 2764. Photo credit: Express Syndication / MEGA TheMegaAgency.com +1 888 505 6342

Novak Djokovic win the Men's Singles Final Wimbledon Championships 2019, Men's Final - Day Thirteen. 14 Jul 2019 Pictured: The Duchess and Duke of Cambridge, Kate and William Wimbledon Championships 2019, Men's Final - Day Thirteen TM/EXPRESS SYNDICATION +44 (0)20 8612 7903/7661 +44 (0)20 7098 2764. Photo credit: Express Syndication / MEGA TheMegaAgency.com +1 888 505 6342

Novak Djokovic win the Men's Singles Final Wimbledon Championships 2019, Men's Final - Day Thirteen. 14 Jul 2019 Pictured: Catherine, Duchess of Cambridge meets the Ball Girls. Photo credit: Express Syndication / MEGA TheMegaAgency.com +1 888 505 6342

Novak Djokovic win the Men's Singles Final Wimbledon Championships 2019, Men's Final - Day Thirteen. 14 Jul 2019 Pictured: Catherine, Duchess of Cambridge Wimbledon Championships 2019, Men's Final - Day Thirteen TM/EXPRESS SYNDICATION +44 (0)20 8612 7903/7661 +44 (0)20 7098 2764. Photo credit: Express Syndication / MEGA TheMegaAgency.com +1 888 505 6342

Image licensed to i-Images Picture Agency. 14/07/2019. London, United Kingdom. The Duke and Duchess of Cambridge arriving for the Men's Singles Final on the last day of the Wimbledon Tennis Championships in London. Picture by Stephen Lock / i-Images

14 July 2019, Great Britain, London: Tennis: Grand Slam, Wimbledon, singles, men, finals. Tournament boss Philip Brook (l-r), Kate, Duchess of Cambridge, and Prince William, Duke of Cambridge, arrive at the All England Lawn Tennis and Croquet Club on the 13th day of the Wimbledon Championships. Photo: Frank Molter/dpa

Image licensed to i-Images Picture Agency. 14/07/2019. London, United Kingdom. The Duke and Duchess of Cambridge watch the Men's Singles Final on the last day of the Wimbledon Tennis Championships in London. Picture by Stephen Lock / i-Images

Image licensed to i-Images Picture Agency. 14/07/2019. London, United Kingdom. The Duke and Duchess of Cambridge watch the Men's Singles Final on the last day of the Wimbledon Tennis Championships in London. Picture by Stephen Lock / i-Images

Duchess of Cambridge and the Duke of Cambridge on day thirteen of the Wimbledon Championships at the All England Lawn Tennis and Croquet Club, Wimbledon, London, UK on July 14, 2019. Photo by Corinne Dubreuil/ABACAPRESS.COM

Duchess of Cambridge and the Duke of Cambridge on day thirteen of the Wimbledon Championships at the All England Lawn Tennis and Croquet Club, Wimbledon, London, UK on July 14, 2019. Photo by Corinne Dubreuil/ABACAPRESS.COM

Duchess of Cambridge and the Duke of Cambridge on day thirteen of the Wimbledon Championships at the All England Lawn Tennis and Croquet Club, Wimbledon, London, UK on July 14, 2019. Photo by Corinne Dubreuil/ABACAPRESS.COM

Duchess of Cambridge and the Duke of Cambridge on day thirteen of the Wimbledon Championships at the All England Lawn Tennis and Croquet Club, Wimbledon, London, UK on July 14, 2019. Photo by Corinne Dubreuil/ABACAPRESS.COM

Duchess of Cambridge and the Duke of Cambridge on day thirteen of the Wimbledon Championships at the All England Lawn Tennis and Croquet Club, Wimbledon, London, UK on July 14, 2019. Photo by Corinne Dubreuil/ABACAPRESS.COM

Duchess of Cambridge and the Duke of Cambridge on day thirteen of the Wimbledon Championships at the All England Lawn Tennis and Croquet Club, Wimbledon, London, UK on July 14, 2019. Photo by Corinne Dubreuil/ABACAPRESS.COM

Duchess of Cambridge and the Duke of Cambridge on day thirteen of the Wimbledon Championships at the All England Lawn Tennis and Croquet Club, Wimbledon, London, UK on July 14, 2019. Photo by Corinne Dubreuil/ABACAPRESS.COM

Duchess of Cambridge and the Duke of Cambridge on day thirteen of the Wimbledon Championships at the All England Lawn Tennis and Croquet Club, Wimbledon, London, UK on July 14, 2019. Photo by Corinne Dubreuil/ABACAPRESS.COM

Duchess of Cambridge and the Duke of Cambridge on day thirteen of the Wimbledon Championships at the All England Lawn Tennis and Croquet Club, Wimbledon, London, UK on July 14, 2019. Photo by Corinne Dubreuil/ABACAPRESS.COM

Duchess of Cambridge and the Duke of Cambridge on day thirteen of the Wimbledon Championships at the All England Lawn Tennis and Croquet Club, Wimbledon, London, UK on July 14, 2019. Photo by Corinne Dubreuil/ABACAPRESS.COM