Roger Federer to retire from professional tennis next week

Swiss tennis great Roger Federer announced his retirement from the sport on Thursday, saying next week's Laver Cup will be his final ATP tournament

RETIRING: Roger Federer, who has announced he will retire from professional tennis after the Laver Cup. Pic: Steven Paston/PA Wire.

Roger Federer has announced his retirement from tennis at the age of 41.

The 20-time grand-slam champion has been struggling with a knee problem for the last three years and has decided now is the time to step away.