Roger Federer is a retired Swiss professional tennis player, arguably the best of all time.

Federer was ranked world No. 1 in singles by the Association of Tennis Professionals (ATP) for 310 weeks, including a record 237 consecutive weeks, and finished as the year-end No. 1 five times. He won 103 singles titles on the ATP Tour, the second most of all time, including 20 major men's singles titles (among which a record eight men's singles Wimbledon titles, and an Open Era joint-record five men's singles US Open titles) and six year-end championships. He is only one of eight men to win all four majors and at the age of 36 he became the oldest world No. 1 player. “Federer: Twelve Final Days,” an Amazon Prime documentary that takes a behind-the-scenes look at the champion’s last fortnight in tennis, aired in 2024.

A Wimbledon junior champion in 1998 and former ball boy, Federer won his first major singles title at Wimbledon in 2003 at age 21. Between 2003 and 2009, he played in 21 out of 28 major singles finals. He won three of the four majors and the ATP Finals in 2004, 2006, and 2007 as well as five consecutive titles at both Wimbledon and the US Open. He completed the career Grand Slam at the 2009 French Open after three consecutive runner-up finishes to his main rival Rafael Nadal. At age 27, he surpassed Pete Sampras's record of 14 major men's singles titles at Wimbledon in 2009.

Federer and Stan Wawrinka led the Switzerland Davis Cup team to their first title in 2014, following their Olympic doubles gold victory at the 2008 Beijing Olympics. Federer also won a silver medal in singles at the 2012 London Olympics, finishing runner-up to Andy Murray. After a half-year hiatus in late 2016 to recover from knee surgery, Federer returned to tennis, winning three more majors over the next two years: 2017 and 2018 Australian Open and the 2017 Wimbledon Championships. In September 2022, he retired from professional tennis following the Laver Cup.

Federer won the Arthur Ashe Humanitarian of the Year twice; the Stefan Edberg Sportsmanship Award 13 times; and was voted ATPWorldTour.com Fan Favorite for a record 14 consecutive years. He was Swiss Athlete of the Year six times and is the only individual to have won the BBC Overseas Sports Personality of the Year award four times. By the end of his career, Federer was routinely one of the top-ten highest-paid athletes in any sport, and ranked first among all athletes with $100 million in endorsement income in 2020.

He is also an active philanthropist. He established the Roger Federer Foundation, which targets impoverished children in southern Africa, and has raised funds in part through the Match for Africa exhibition series.

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