Roger Federer Announces , His Retirement From Tennis.<br />Roger Federer Announces , His Retirement From Tennis.<br />The tennis champion announced his retirement via Twitter on Sept. 15.<br />Tennis has treated me more generously than I ever would have dreamt, and now I must recognize when it is time to end my competitive career, Roger Federer, Tennis Legend, via CNBC.<br />I will play more tennis, of course, but just not in Grand Slams or on the tour, Roger Federer, Tennis Legend, via CNBC.<br />Federer referred to his decision as "bittersweet.".<br />This is a bittersweet decision because I will miss everything the tour has given me, Roger Federer, Tennis Legend, via CNBC.<br />But at the same time, there is so much to celebrate. I consider myself one of the most fortunate people on Earth, Roger Federer, Tennis Legend, via CNBC.<br />Federer concluded his letter by proclaiming his love and commitment to the game of tennis.<br />Finally, to the game of tennis: <br />I love you and will never <br />leave you, Roger Federer, Tennis Legend, via CNBC.<br />Roger Federer's professional career includes <br />20 Grand Slam titles and spans almost a quarter of a century. .<br />He began as a teenager, upending men's tennis royalty of the late-1990s and created rivalries with other up-and-coming players at that time, such as Rafael Nadal.<br />He began as a teenager, upending men's tennis royalty of the late-1990s and created rivalries with other up-and-coming players at that time, such as Rafael Nadal.<br />He began as a teenager, upending men's tennis royalty of the late-1990s and created rivalries with other up-and-coming players at that time, such as Rafael Nadal.<br />The Swiss player dominated <br />men's tennis for nearly two decades.<br />Federer has set numerous records, including the most consecutive weeks as the number one player in the world: 237.<br />Federer has set numerous records, including the most consecutive weeks as the number one player in the world: 237.<br />He has also become one of the wealthiest tennis champions, accruing more than $130 million in career earnings alone.<br />Next week's ATP event in London, the Laver Cup, will be Federer's final professional appearance