It should be a good clash. Querrey after unfortunate end of 2009 seems to be back on track, especially on home country courts and Gulbis is having explosion this week, finally playing on level of his potential. Gulbis received treatment in final set against Berdych and it might be a problem, but from what I saw, sooner he will retire early in the match if he will still feel discomfort, other than that he should be all right and pumped after taking down back-to-back Stepanek and Berdych. Querrey took revenge after last week loss in San Jose on Roddick and it was impressive to watch how Sam breaks king of serve twice early this match. If Gulbis knees are fine I'm sure he won't let Sam easily, even if Sam is back on track and plays home, he can't underestimate Gulbis, who got great potential, power and ideas. Match with Berdych was one of the best I saw this season, both were playing great and Gulbis showed excellent mixed game with enormous pressure handle skills as he was down 1-4 in final set and probably in pain due to his knee. I'm sure both can match their games and big serves will help to pull up many games. Gulbis was tricking nicely with his serve Berdych scoring over 20 aces. I sense 2-1 for Sam here, although I hope for a win for great Latvian talent.