After weeks of playing through the soreness in his right knee, Carmelo Anthony finally underwent a corrective procedure Thursday, flying back to New York and having fluid drained to reduce the swelling.

According to the Knicks, Anthony met with doctors in New York and had a soft-tissue fluid collection of his posterior right knee aspirated. While no timetable was set for his return to action, Anthony is planning on flying to Los Angeles to meet the team and is listed as questionable for Sunday afternoon's game against the Clippers.

The Knicks were without Anthony and also missing center Tyson Chandler on Thursday as they faced the Portland Trail Blazers. Chandler suffered a left knee contusion Wednesday in the Knicks' loss at Denver, and like Anthony, is listed as questionable for Sunday. The starting lineup Thursday included Kenyon Martin, Chris Copeland and Kurt Thomas on the front line.

Anthony sat out three games after leaving the Knicks' win in Cleveland on March 4 after just 14 minutes, 15 seconds. He tumbled to the floor that night, got up and walked straight to the locker room. He said later the knee had been bothering him for three weeks and that he had already undergone an MRI, which revealed no structural damage.