The commentators' suggesting that he may have some back problem. It's possible, seeing how tentatively he's been serving the whole match. Then again, it could be just him not feeling his serves today, and not much feel for his ground game either. The only thing that's working seems to be the volleys, how funny.
Oh well, he tried. Hope Lopez has a good tournament, his serve was looking amazing today. Maybe Gilles can have a bit of a break and really focus on having a few successful months to get his ranking closer to what it should be.