Bethanie Mattek-Sands suffers a devastating knee injury during her singles match at Wimbledon on Thursday.
Pacers guard Victor Oladipo was taken off the court on a stretcher after suffering a serious right knee injury on Wednesday night.
The San Francisco 49ers lost quarterback Jimmy Garoppolo to what appeared to be a serious left knee injury in Sunday's loss to K.C.
Nico Siragusa, a 2017 fourth-round draft choice of the Baltimore Ravens, suffered a severe knee injury on Tuesday, according to NFL Network.
Steelers cornerback Artie Burns left Wednesday's practice with a non-contact knee injury according to teammates.
Boston Celtics forward Gordon Hayward suffered a gruesome injury to his left leg just minutes into the team's opener against Cleveland.
Duke star freshman Zion Williamson left Wednesday's contest against rival North Carolina after suffering a knee injury just 33 seconds into the game.