Roger Federer fights back to reach Halle Open final

World number three Roger Federer moved closer to winning his first title of the season by defeating Germany's Tommy Haas to reach Halle Open final.

Federer came from behind to beat the defending champion 3-6 6-3 6-4.

"I felt good out there and, as I had predicted, it was a tough match. [The final] will not be easy but I'm really looking forward to it," said Federer.

The 31-year-old, a five-time champion at Halle, will play either Richard Gasquet or Mikhail Youzhny on Sunday.