He's not evil, he's adorable
He nods to himself all the time by way of encouraging himself. It looks so much more appealing than fist pumping (not that I have anything against that).
Not all players who beat his oh-so-loveliness are evil, Becca.
Just You Know Who. Besides, Juanqui beat DiP at the US Open, and that was Arnaud's last match before he had to retire for more than half a year. Talk about revenge... Poor Arnaud.