TIMELINE - Roger Federer's journey to the top of the men's game
Roger Federer said he will retire from competitive tennis following next week's Laver Cup in London. Following is a timeline charting the 20-time Grand Slam champion's rise to the top of the game: 2001: Burst onto the scene, ending American Pete Sampras' 31-match winning streak at Wimbledon in the fourth round before losing in the quarter-finals to Tim Henman.