Serbia's Novak Djokovic reacts after winning a game in the third set against Belgium's David Goffin during their men's singles quarter-final match on day nine of the 2019 Wimbledon Championships at The All England Lawn Tennis Club in Wimbledon, southwest London, on July 10, 2019. (Photo by Adrian DENNIS / AFP) / RESTRICTED TO EDITORIAL USE (Photo credit should read ADRIAN DENNIS/AFP/Getty Images)
MELBOURNE, AUSTRALIA - JANUARY 20: Roger Federer of Switzerland reacts in his fourth round match against Stefanos Tsitsipas of Greece during day seven of the 2019 Australian Open at Melbourne Park on January 20, 2019 in Melbourne, Australia. (Photo by Darrian Traynor/Getty Images)
PARIS, FRANCE - JUNE 09: Rafael Nadal of Spain during the mens singles final against Dominic Thiem of Austria during Day fifteen of the 2019 French Open at Roland Garros on June 09, 2019 in Paris, France. (Photo by Clive Brunskill/Getty Images)
