(FILE PHOTO) Rafael Nadal,Grand Slam champion, will retire from tennis at the end of this season. MONTREAL, QC - AUGUST 09: Rafael Nadal of Spain salutes the spectators after his victory against Fabio Fognini of Italy during day 8 of the Rogers Cup at IGA Stadium on August 9, 2019 in Montreal, Quebec, Canada. Rafael Nadal of Spain defeated Fabio Fognini of Italy 2-6, 6-1, 6-2. (Photo by Minas Panagiotakis/Getty Images)