World number seven Petra Kvitova has become the sixth player to qualify for the season-ending WTA Finals in Shenzhen, the WTA said on Monday. The 29-year-old Czech, who won the title on her debut in 2011, will join Ash Barty, Karolina Pliskova, Simona Halep, Bianca Andreescu and Naomi Osaka at the Oct. 27-Nov. 3 tournament, which offers $14 million in prize money. "I'm so happy to qualify," Kvitova, who won titles in Sydney and Stuttgart and finished runner-up at the Australian Open this year, said in a statement. "After a great start to the year in Australia I'm really proud to have secured my spot for the seventh time. This will be the third city I have visited for the WTA Finals so I'm excited to see what's in store in Shenzhen." The top eight singles players face off in a round-robin format at the WTA Finals, with the winner taking home the Billie Jean King Trophy. — Reuters
