Wimbledon: Petra Kvitova in ruthless form but still to hit top gear
Defending Wimbledon champion Petra Kvitova has warned her rivals she is yet to hit top form despite conceding only three games in her opening two matches.
Kvitova thrashed Japan's Kurumi Nara 6-2 6-0 on Court 1, just two days after her 6-1 6-0 demolition of Kiki Bertens which took 36 minutes and was the fastest women's match at Wimbledon since 2004.
The number two seed is gunning for her third title at the All England Club and insists there is still more to come despite the resounding start to her campaign.
"It wasn't really easy, of course the score looks very easy but a few games which we played were really close," Kvitova said.
"I'm just glad that I won. That's important, all that counts is the last point.
"I still have a lot of space where I can improve for the next match - that's a good sign as well.
"The next match will be tough again, and tougher and tougher, if I'm going to stay in the tournament. I have to be prepared for everything."
Kvitova will next face former world number one Jelena Jankovic, who she beat at the Rome Masters earlier this year but has never met on grass.
"It's always a big challenge to face her," Kvitova said.
"She's a former number one player. It's always a little bit special.
"She always has some sort of weapon to play, especially her backhand, it's really great."