Friday 22 February 2013 07:30, UK
Petra Kvitova knocked out reigning champion Agnieszka Radwanska to reach the semi-finals of the WTA Dubai Tennis Championships.
"Normally she's with me on my side of the net and not on the other one, so to see her on the other side is tough because one of us will lose," Errani said on the WTA Tour's official website. "She's an amazing person outside the court. Outside the court she will always try to help you when she can. She's like a sister to me. We stay together maybe 300 days a year. Of course we have had a lot of good moments together."
