Defending champion Serena Williams has ensured a place in the semi-finals of the WTA Championships with a 6-2, 6-3 win over Petra Kvitova, the 2011 champion.
According to Sport24, it lasted only 72 minutes and it was Williams's third win in her group, leaving her with a day's rest before she seeks a place in the final by taking on the runner-up in the other group.
That could be Jelena Jankovic, Li Na, or Victoria Azarenka, the report said.
The American was relentlessly focused against her gifted Czech opponent, who had led 4-1 in the final set when the two last met, eight months ago in a magnificent match in Doha, but Williams was never headed this time, the report added.
