BARCELONA, SPAIN – APRIL 19: Kei Nishikori of Japan looks on during his match against Guido Pella of Argentina during Barcelona Open Banc Sabadell 2021 on April 19, 2021 in Barcelona, Spain. (Photo by Alex Caparros/Getty Images)
MELBOURNE, AUSTRALIA – JANUARY 20: Jannik Sinner of Italy plays a backhand during his Men’s Singles first round match against Max Purcell of Australia on day one of the 2020 Australian Open at Melbourne Park on January 20, 2020 in Melbourne, Australia. (Photo by Hannah Peters/Getty Images)