Tommy Robredo of Spain quit his first-round match at the Swedish Open because of an injured left thigh.
The fifth-seeded Spaniard was trailing Filippo Volandri of Italy 7-5, 5-5. Robredo has won the Swedish Open twice. Volandri will face Mikhail Kukushkin or Andreas Haider-Maurer in the second round.
Top-seeded Robin Soderling of Sweden plays his first match at the clay-court tournament in Bastad on Wednesday.