I like the clapping, even though the reason is probably less to demonstrate appreciation for his opponent's awesomeness than to make himself feel less bad for losing the point. "Too good, I couldn't do a damn thing about it." It's a common psychological trick to avoid getting too down on yourself - you can't control certain environmental factors (here counting the opponent as an environmental factor, even though he's really not), so chalk it up to luck/nature/God and move on.
Anyway, I like it because I'm kind of sick of all these players, male and female, that just beat themselves up all the time even when they're winning. So negative. Djoker is a bit of fresh air in that regard, even if it is a psychological trick.