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Federer falls in three sets to the No. 302 player in the world, Tommy Haas<p>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 …

Read more at CBS Sports: http://www.cbssports.com/tennis/news/roger-federer-return-to-tennis-ends-in-biggest-upset-of-his-career/