'I was down': Federer had hard time before 2nd knee surgery
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Roger Federer never seriously contemplated retirement while he was away from the tennis tour for more than a year. He did have a hard time dealing with the need for a repeat operation on his bad right knee, though. "I was down. Obviously I couldn't believe I had to do a second one," Federer said Sunday ahead of his appearance at the Qatar Open. "This is definitely a moment where you maybe question a little bit more."