Kvitova sacks second coach this year

Two-time Wimbledon champion Petra Kvitova said Tuesday she had parted ways with Frantisek Cermak after the US Open, the second coach she has sacked this year. "After coming back from America, we have agreed with Frantisek Cermak to end our cooperation," the 26-year-old Czech world number 16 said in a press release. "For now I will train without a coach like at the beginning of the season, but of course that's not the final state of things," added the 2011 and 2014 Wimbledon winner.