Seattle Sounders glamour signing Freddie Ljungberg has undergone hip surgery. Former Arsenal star Ljungberg, 31, had surgery Friday in Vail, Colo., to repair what the team is calling a "hip condition." The surgery was performed by Dr. Marc Philippon.

It is uncertain when Ljungberg will be cleared to begin training, but the Sounders FC, which just hired Sigi Schmid as its head coach, could be without its star attraction for the early part of the season.

"Freddie Ljungberg is a player that we value for the long term," Sounders FC general manager Adrian Hanauer said in a statement. "As Freddie increased his training regimen for the upcoming season, we wanted to make sure that he was firing on all cylinders for the next two years and beyond.

"As he increased his training intensity, he suffered a mild re-occurrence of the hamstring problems that have occasionally hampered him over the past two years. At that point, Freddie and the club wanted to be proactive, and we decided to have him see the best hip and hamstring specialists in the country."