Fair enough, but that last match of Robby's was a very rare result for him... not the fact that he lost (because he can lose to anyone when he's not playing well), but because Robby almost always wins at least 8 games in every match he plays, regardless of how highly ranked his opponent is. And in his last match, he couldn't hold serve to save his life, and he only won six games (thanks to his return game). That's very rare for him.
As far as the match-up is concerned, the match really could have gone either way. The only time they've played on hardcourt before, Robby won, so... I didn't expect a certain player to win this match I guess.