Roger Federer Announce Retirement: The uncrowned king of the tennis world, Swedish great Roger Federer has announced his retirement from tennis. He has announced his retirement today with his Twitter handle. Roger Federer, who has won 20 Grand Slams, was struggling with injury for the last few years. Due to this he had to undergo surgery several times. Roger was unable to show his old flair on the court for the last few years due to his injury and surgery. Meanwhile, Roger has announced his retirement. Roger retired and said that the Laver Cup at the ATP event in London would be his last tournament.