Roger Federer says he was at the peak of his powers from 2005-07, when he won 32 tournaments, including two Australian Opens, three Wimbledons and three U.S. Opens.

“I consider I had one of my best years from 2005-2007 so of course I was confident going on court,” Federer said. “I was in a zone and it is really important to be there for the longest possible time. Enjoy it, add titles, live the dream. As a kid I wanted to be a professional and be able to play big matches in big stadiums, that was what it was all about for me. I’ve been more successful than I’ve ever thought I was going to be. If I wanted more success I had to work harder and sacrifice some things.”

The 33-year-old says that with all of his success, his perspective on the game has changed. “My life has changed, my mindset different,” Federer said. “My titles, my records are all there so I feel less pressure. I don’t want to say I’m less driven but I’m in a really good place right now. I enjoy playing tennis with a proper goal in mind—that’s what’s important to me. I enjoy practice, enjoy traveling, enjoy the matches, everything that surrounds the game.”