Clearly, the answer to the question posed in the title is "yes," based on his actions in the huddle before Tunisia's loss to Team USA.
While they lost 110-63, Tunisia didn't look all that bad. They beat the 55.5-point spread somewhat easily, and forward Makram Ben Romdhane actually played pretty well, finishing with 22 points, 11 rebounds and 4 assists. He actually led all scorers, but that was partially due to the fact that Team USA spread the wealth quite a bit, with 6 players in double figures.
For some reason, though, Tunisian coach Adel Tlatli felt the need to give one of his players a wake-up call of sorts, slapping him in the face in the pre-game huddle.
Hey... sometimes you just have to let your players know who's boss, right?
Check it out:
Tunisian coach slaps player in the face during game vs Team USA