Oklahoma City Thunder forward Serge Ibaka exited Game 6 of their Western Conference semifinal series with the Los Angeles Clippers with a left calf injury.
Ibaka limped to the sideline early in the third quarter and began rubbing his calf. After speaking with a team trainer, Ibaka went to the locker room for further evaluation.
The team said his return is doubtful.
The league-leader in blocks had scored six points and grabbed two rebounds prior to exiting.