Roger Federer's return to tennis after a two-month break didn't go as planned. The No. 2 player in the world suffered the biggest upset loss of his career on Wednesday, falling to world No. 302 Tommy Haas at the Mercedes Open in Germany.
It's the first time Federer has lost to a player ranked so low since 1999, and the only time that he's been ranked so high and lost to a player so far down. The 2-6 7-6 6-4 defeat marked his first opening round loss on grass in 15 years. All-in-all, it was a perfect storm of struggle for Federer, whose reappearance was highly anticipated.