Yi suffered the injury after he was accidentally elbowed on the mouth by a team mate while playing three on three on Saturday, the Nets said on their website (www.nba.com/nets). He will be examined on December 14 to determine when he can return to game action.
The Chinese Olympian has played in only four games this season, averaging 9.8 points and 7.5 rebounds. He has missed the past 15 games with a sprained right medial collateral ligament (MCL).
(Reporting by Gene Cherry in Salvo, North Carolina; editing by Pritha Sarkar)