Williams V. vs Kvitova P. prediction

This WTA US open match up is between Petra Kvitova and Venus Williams are playing for a spot in semifinals of US Open. Kvitova have won four of the previous five games Between them. She beat Muguruza last round even though she was not in a good situation in any of the sets. She was losing 1-4 in the first with few break points for 1-5. She was losing in the second set as well. Kvitova could easily lose that last match, but she got much of self convident after that match up. My tip: Kvitova