World number one Roger Federer says he will play at the French Open and Wimbledon without a coach following his split from Tony Roche.
Federer is on his worst run of form since becoming world number one
The 25-year-old won six of his Grand Slam titles while working with Roche, and the French Open is the only Grand Slam crown which has so far eluded him.
"I'm not taking a coach because I know what it takes to win. I don't want anyone interfering," the Swiss said.
"Maybe down the road I'll look for someone to help me out for practice."
He had been working with the 61-year-old Roche on a
part-time basis since 2005. But after a run of four tournaments without a title, Federer announced their split on Saturday, citing communication problems.
"It wasn't an easy decision," Federer told reporters at the
Hamburg Masters, where he is the top seed and has a bye to the second round.
"He's helped me a lot but in the end he was a part-time
coach. We were together only 15 weeks a year and I just thought
the communication wasn't going very far any more."