Calm Kvitova an easy winner

BIRMINGHAM, ENGLAND— Two-time Wimbledon champion Petra Kvitova produced her most encouraging result since returning from a knife attack to advance to the quarter-finals of the Aegon Classic, a Wimbledon warm-up tournament. The lefthanded Czech hit 25 winners with 11 unforced errors as she easily beat fellow wild card Naomi Broady of Britain 6-2, 6-2 on Wednesday. “I have a little bit different view for tennis right now,” Kvitova said. “I’m just a little bit more relaxed, I think.”