Commentator keeps cool despite racy scene behind him

A Dallas Mavericks commentator has somehow remained focused despite a racy scene playing out behind him.

Broadcaster Derek Harper kept a straight face and continued his post-game analysis as a woman's behind was grabbed and jiggled right behind him.

Harper was reviewing the Mavericks' 128-90 loss to the Cleveland Cavaliers when the incident occurred.

While the two friends embraced he could see the incident occurring behind him on his monitor, but showed his professionalism to stay on track.

The women appeared to burst into laughter after the bum grab, making it seem like a pre-planned attempt to have some fun on live TV.

Similar incidents have occurred in the NBA in recent times.

Last year, the Cleveland Cavaliers were even trapped on court by dancing cheerleaders.