Still waiting for 1st title of 2013, Federer expects his best still to come this year

Roger Federer is confident his best is yet to come with the return to grass courts.

It's nearly mid-June and Federer is still without a title in 2013. He is the top-seeded player in Halle, a grass-court warm-up tournament for Wimbledon. Four of his Wimbledon championships came after Federer also won Halle.

The 31-year-old Federer is looking for his sixth title in Halle and says it's "one of my favorite places on the tour, and being successful there makes it even more likable."

Federer will also play doubles, teaming up with German veteran Tommy Haas, who beat him in last year's Halle final.