Why does Petra Kvitova tend to higher amount of errors?
Petra Kvitova (*1990 / CZE) belongs with her 2 Wimbledon titles and 4 Fed Cups wins to the top female players of the past 10 years. A few years ago, she was even one match shy of becoming WTA’s # 1. Despite her excellent achievements, Petra seems to have some problems with her constancy and one...