DUBAI, United Arab Emirates — Andy Murray withdrew from the Dubai Tennis Championships today because of a viral infection, just hours before a quarterfinal match against Richard Gasquet.

Murray, also bothered by an ankle injury, said he's been feeling poorly since the Australian Open last month.

"I got it first down in Australia, and I haven't been the same really since," Murray said. "I woke up in the middle of the night sweating. I got some anti-viral (medication) from the doctor ... but it didn't help so much."

Murray's withdrawal gave Gasquet a walkover into the semifinals, where he will face David Ferrer.

On Wednesday, the second-seeded Murray defeated Arnaud Clement 6-2, 6-3.

"In between the sets, I felt so tired, really weak," Murray said. "When the adrenaline sort of wore off, (I) felt just very cold and sort of shivery. So obviously, felt my temperature was up. My body was just aching a little bit. I need to take some time off."

Murray is uncertain for Britain's Davis Cup match against Ukraine next week. His doctor advised him to rest for a week to 10 days.

"I don't know. I obviously want to try and play," Murray said. "Ill see how I feel and give it my best shot to get ready."

Murray's withdrawal is another blow for an event already hit by controversy and a spate of injury-related absences.

Top-ranked Rafael Nadal and No. 2 Roger Federer pulled out with injuries. Andy Roddick declined to defend his title, saying he disagreed with the Emirates' decision to deny Israeli Shahar Peer a visa to play in the women's tournament.