Robredo retires in Swedish Open 2011

Tommy Robredo was forced to retire in his first-round match against Filippo Volandri in the Swedish Open because of a left thigh injury.

Volandri won the first set 7-5 and the score was level at 5-5 in the second when Robredo called it quits.

Volandri will face Mikhail Kukushkin or Andreas Haider-Maurer in the second round.

Top-seeded Robin Soderling plays his first match at the clay-court tournament in Bastad on Wednesday.