Gordon Hayward suffered severe broken leg just over five minutes into his first game with the Boston Celtics.
The incident came on a lob in the first quarter. There was only minimal contact and Hayward seemingly just landed awkwardly on his left leg when it broke.
The sound could be heard over the television broadcast.
A hush immediately fell over the crowd and players were shown with shocked looks on their faces while other players were seen praying.
Here is the video, via TNT.
WARNING: VIDEO CONTAINS GRAPHIC CONTENT.
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