Roger Federer celebrated his 29th birthday this week but the cagey Swiss said he was not too old to learn a few new tricks as he launched his North American hardcourt campaign with coach Paul Annacone at his side.
The 16-time grand slam winner came to the Toronto Masters with his wife, twin girls and Annacone -- the newest member of his compact entourage -- eager to finish an up-and-down year on a high note with a victory at the US Open in September.
Federer has spent much of his prime years working alone, but a crushing quarter-final exit at the All England Club, some stagnating play and a lower ranking convinced him it was time for some fresh thinking.
"I've always questioned myself in the best of times and in the worst of times, even though there were not many bad moments the last seven years or so," Federer told reporters on Monday.
"But I always look at new ways I can improve. Paul, I think, with his experience can bring something to our team and that's what we're exploring right now."