I posted my reports about Guillaume in Hamburg on "Les joueurs de l'ombre", here's just the link of the album:
Not enough variations in his game for my liking (and the opponent - Struff - didn't help in that regard, he was a "poor man's Rufin", so it was quite monotonous), but I was impressed by Guillaume's focus and fight since he was obviously injured (left thigh).
I was also impressed by his aggressive play on Struff's 2nd serves, he was standing 1-2 meters in the court to return the serves.
He's too funny to watch off-court with his Professor Calculus look.
I hope he will be able to play today in spite of the thigh injury, he has the best possible draw with Rosol.
Edit: he retired at 6-3 3-0. :-/