Los Angeles: Top seed Andy Roddick overcame spirited resistance from fellow American Scott Oudesma before advancing to the Los Angeles Open quarter finals with a 6-7, 6-3, 6-2 victory on Thursday.

However, Roddick suffered an abdominal muscle strain late in the match and is considering withdrawing from the event with the US Open looming large next month.

“I hit the one passing shot and strained something in my side,” a subdued Roddick said.

“It doesn’t feel too good right now. If it’s like this tomorrow, I don’t think there’s a lot of hope.

“Once it happened, it was always there. When I served, and pretty much on every shot, there was pretty intense pain.

“I didn’t play my best stuff but I got through tonight,” added the world No. 10, who unleashed 21 aces before setting up a last-eight meeting with Dmitry Tursunov.

The former World No.1 is now being coached by Jimmy Connors. (Reuters)