FILE - Spain's Rafael Nadal, right, walks from Croatia's Marin Cilic after he withdrew injured from their quarterfinal at the Australian Open tennis championships in Melbourne, Australia, Tuesday, Jan. 23, 2018. This edition of the Grand Slam tournament at Roland Garros, which begins Sunday, is expected to be his last as the end of his career approaches after a series of injuries and limited play the past two seasons. (AP Photo/Dita Alangkara, File)