LONDON, ENGLAND - JULY 11: Catherine, Duchess of Cambridge is seen in the stands during Day Thirteen of The Championships - Wimbledon 2021 at All England Lawn Tennis and Croquet Club on July 11, 2021 in London, England. (Photo by Julian Finney/Getty Images)
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Getty Images Sport Julian Finney

LONDON, ENGLAND - JULY 11: Catherine, Duchess of Cambridge is seen in the stands taking part in a Mexican wave during Day Thirteen of The Championships - Wimbledon 2021 at All England Lawn Tennis and Croquet Club on July 11, 2021 in London, England. (Photo by Julian Finney/Getty Images)
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Getty Images Sport Julian Finney

LONDON, ENGLAND - JULY 11: Catherine, Duchess of Cambridge is seen in the stands during Day Thirteen of The Championships - Wimbledon 2021 at All England Lawn Tennis and Croquet Club on July 11, 2021 in London, England. (Photo by AELTC - Pool/Getty Images)
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Getty Images Sport Pool

LONDON, ENGLAND - JULY 11: Catherine, Duchess of Cambridge is seen in the stands during Day Thirteen of The Championships - Wimbledon 2021 at All England Lawn Tennis and Croquet Club on July 11, 2021 in London, England. (Photo by AELTC - Pool/Getty Images)
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Getty Images Sport Pool

LONDON, ENGLAND - JULY 11: Michael Middleton and HRH Catherine, the Duchess of Cambridge attend Wimbledon Championships Tennis Tournament at All England Lawn Tennis and Croquet Club on July 11, 2021 in London, England. (Photo by Karwai Tang/WireImage)
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WireImage Karwai Tang