I don't think playing early the morning will be a determinant factor because he has take few weeks holidays in france so if he hasn't degest completely the jet lag (- 6 hours), it is like if he playing the afternoon.
For sure Richard will be under pressure, but it is in this condition we can see the true champions. He succed in his first Davis Cup match, I hope he will reiterate this kind of performance more and more often. The match against Youzhny is a good test.
Allez Richard you can do it and you will do it