Already without Rajon Rondo and Jared Sullinger, the Boston Celtics suffered what could be another serious injury when guard Leandro Barbosa sustained a knee injury in Monday's game against Charlotte.
The extent of the injury will not be known until an MRI is performed on Tuesday, but it did not look good.
Barbosa had to be helped off the floor by a teammate and a trainer.
Celtics center Kevin Garnett said he feared it was a season-ending injury.
Barbosa is averaging just 5.3 points, but his playing time and scoring had increased since Rondo's injury.