"He iced it, and stuff, and we'll see how he feels (Saturday)," McHale said indicating that he didn't think the injury was serious.
Harden, who entered the game as the team's leading scorer in the preseason with a 20.8 average, connected on a 3-pointer from the right wing with 4:35 left in the first quarter and went down to the court in front of the Rockets bench when he was fouled by Pondexter.
Harden eventually got up, made the ensuing free throw and went straight to the locker room at the next stoppage of play.
Harden finished with six points and four rebounds in his 7-plus minutes before the injury.
Marc Gasol led Memphis with 17 points, but connected on only 4 of 13 shots.
The game was a bit chippy at times with Gasol and the Rockets Dwight Howard earning double technicals in the first half, and Memphis forward Ed Davis drawing an ejection with a flagrant foul in the fourth.
Jorge Sedano explains why the Heat are being noncommittal about whether Chris Bosh will play this postseason, despite Bosh's desire to do so.
NBA referees have made several high-profile incorrect calls, or non-calls, in the final few minutes of this year's playoffs.
Jorge Sedano says the performance of Dwyane Wade and the Heat in this year's playoffs will determine how attractive the team will be to free agents this summer.