Petra Kvitova, who pulled out of Eastbourne with a sore throat, says that Serena Williams has a real chance to win all four Grand Slam tournaments this year.

The world No. 2 won Wimbledon last year, and is the only player to defeat Williams this season, overcoming the American in the semifinals of Madrid.   
“Serena, of course we saw how well she's playing,” Kvitova said. “I think that she's really big champion. I think she can really make it. I think that every tournament is a little bit different, and I know how Serena really likes to play on the grass, so for sure she gonna be very dangerous. It's nice that somebody playing so well.”  
Kvitova said that it is not just herself and five-time champion Serena who have a good shot of winning Wimbledon, saying there are some other players who can grab the title.  
“I think of course still Maria [Sharapova],” said Kvitova, a two-time Wimbledon champion. “We have to count with her. I think Simona [Halep] had a great run last year. I think when she has her form, she really can be dangerous player. Of course I think some other girls who like to play on the grass, [Sabine] Lisicki, with her serve, she can be dangerous, as well. I think it's not just few players, but it's quite a lot and still the tennis, women's tennis is still very open.”