[Rusty Backhand]

Lleyton Hewitt withdrew because of a groin injury and Robby Ginepri lost in the quarterfinals Friday, eliminating the second- and third-seeded players from the Thailand Open. Top-seeded Roger Federer, the defending champion, had no trouble in reaching the semifinals with a 6-4, 6-3 win over Gilles Muller of Luxembourg.

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