First round matches were still being played today at the Zurich Open, and one of the casualties was the resurgent Nadia Petrova, who was run over by Flavia Pennetta, 6-1, 6-1. Petrova hit only one ace, had just a 49 first serve percentage, a 56 first serve win percentage, and a terrible 21 second serve win percentage. She also made unforced errors all over the place, and was generally considered to be very out of sorts during the match. I have seen an out-of-sorts Petrova before, and it isn't pretty.
Pennetta, for her part, broke Petrova five times and was never broken back.