Roger Federer wants to bring the curtain down on his career by teaming up with long-time rival Rafael Nadal at the Laver Cup in London on Friday.
The 20-time Grand Slam winner announced last week he intended to retire after the three-day tournament at London's 02 arena, which starts on Friday.
Federer, whose most recent competitive match was a loss to Hubert Hurkacz in last year's Wimbledon quarter-finals, has been struggling with a knee problem.