Roger Federer was vegetarian until 16; then what changed?

Roger Federer reflected on his illustrious career during his International Tennis Hall of Fame induction last August. Away from tennis, the Swiss legend revealed he was vegetarian until 16. In 1998, teammate Marc Rosset encouraged him to try meat during a Davis Cup trip to a steakhouse. Federer enjoyed several varieties and resumed eating meat, while his wife, Mirka, later helped him develop a taste for fish.