Roger Federer, who announced his retirement on Thursday, won 103 singles titles. The 41-year-old bagged his first ATP title win in 2001 at Milan. His most successful calendar year was 2006 during which he won 12 titles. He holds records for most titles at Basel (10), Halle (10), Wimbledon (8), ATP Masters 1000 Cincinnati (7) and Nitto ATP Finals (6).