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Britain's Catherine, Duchess of Cambridge (R), meets ball boys and girls as she visits The All England Lawn Tennis Club in Wimbledon, south-west London, on July 3, 2017 on the first day of the 2017 Wimbledon Championships. / AFP PHOTO / POOL / Gareth FULLER / RESTRICTED TO EDITORIAL USE (Photo credit should read GARETH FULLER/AFP/Getty Images)

Britain's Catherine, Duchess of Cambridge (R), meets ball boys and girls as she visits The All England Lawn Tennis Club in Wimbledon, south-west London, on July 3, 2017 on the first day of the 2017 Wimbledon Championships. / AFP PHOTO / POOL / Gareth FULLER / RESTRICTED TO EDITORIAL USE        (Photo credit should read GARETH FULLER/AFP/Getty Images)

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Philip Brook (L), Chairman of the All England Lawn Tennis Club assists Britain's Catherine, Duchess of Cambridge (C), as she meets players, servicemen and servicewomen as she visits The All England Lawn Tennis Club in Wimbledon, south-west London, on July 3, 2017 on the first day of the 2017 Wimbledon Championships. / AFP PHOTO / POOL / Gareth FULLER / RESTRICTED TO EDITORIAL USE (Photo credit should read GARETH FULLER/AFP/Getty Images)

Philip Brook (L), Chairman of the All England Lawn Tennis Club assists Britain's Catherine, Duchess of Cambridge (C), as she meets players, servicemen and servicewomen as she visits The All England Lawn Tennis Club in Wimbledon, south-west London, on July 3, 2017 on the first day of the 2017 Wimbledon Championships. / AFP PHOTO / POOL / Gareth FULLER / RESTRICTED TO EDITORIAL USE        (Photo credit should read GARETH FULLER/AFP/Getty Images)