Roger Federer announces his retirement from tennis

The tennis champion announced his retirement via Twitter on Sept. 15. "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. "I will play more tennis, of course, but just not in Grand Slams or on the tour." Roger Federer, Tennis Legend, via CNBC. Federer referred to his decision as "bittersweet". "This is a bittersweet decision because I will miss everything the tour has given me."