quality:corruption
Coaches

From ages 8 to 10, Federer received group and individual training from veteran Czech coach Adolf Kacovsky. Reflecting on Federer, Kacovsky said "The private lessons, which were partly funded by the club. Roger was a quick learner. When you wanted to teach him something new, he was able to pick it up after three or four tries, while others in the group needed weeks". At age 10, Federer began working with Peter Carter. Between the ages of 10 and 14, Federer spent more time with Carter than with his own family, working daily on all aspects of his game. Building on the work done earlier by Kacovsky, Carter helped perfect Federer's technique, along with teaching him the strategy and psychology required to play the game to a high level. Federer has credited Carter for his "entire technique and coolness".

In 1999, when Federer decided to play full-time on the ATP tour, he chose Peter Lundgren rather than Carter as his traveling coach, and they worked together until the end of 2003 before eventually splitting. On 1 August 2002, Carter died in a car crash in South Africa. According to his autobiography, when Federer learned of Carter’s death "he was never so upset in his life", while an Australian newspaper reported when Federer heard the news, he "left his hotel and ran through the streets, bawling and hysterical". About Carter's funeral, Federer stated: "Any defeat in tennis is nothing compared to such a moment". His death had a deep impact on Federer, who would even call it "a wake-up call", before winning his first major in the following year, Wimbledon, which he dedicated to Carter.

Federer's playing style has been greatly influenced by his coaches over the years. For instance, he has credited his infamous SABR technique to his coach Severin Lüthi, who encouraged him to develop it and use it in big matches.

His other coaches were Tony Roche (2005–2007), Severin Lüthi (2007–2022), José Higueras (2008), Paul Annacone (2010–2013), Stefan Edberg (2014–2015), and Ivan Ljubičić (2016–2022).