PHILADELPHIA — Injured Philadelphia 76ers all-star center Andrew Bynum says he has suffered a “setback” in his return from a knee injury.

Bynum, acquired by Philadelphia in a four-team trade before the season, has yet to play for the Sixers. He spoke before Friday night’s game against Utah.

He has been recovering from a bone bruise on his right knee and his return has been pushed back three times since the beginning of training camp. The Sixers were hoping Bynum would be cleared to return to basketball activities by Dec. 10.

That date is now in question because of issues with his left knee.