"Maybe the score looked easy, but the match wasn't really easy today. We had a lot of fighting in many games," said Kleybanova, who had beaten Zvonareva twice.
Wozniacki reaches quarterfinals in Dubai →
In a posting on the WTA's website Friday _ her 22nd birthday _ Kleybanova said there's a chance she'll be able to play again.
Tennis player Alisa Kleybanova treated for cancer →