Wawrinka, the 39-year-old three-time Grand Slam champion who has now slipped to 217th in the world, had beaten Andrey Rublev in the quarter-finals on Friday
Wawrinka, the 39-year-old three-time Grand Slam champion who has now slipped to 217th in the world, had beaten Andrey Rublev in the quarter-finals on Friday