Russia's Elena Dementieva claimed her first Kremlin Cup title with a shock win over Serena Williams in Moscow.
Dementieva took her record against Williams to 1-4
The hometown player, who turns 26 on Monday, fought back to win 5-7 6-1 6-1 for her first victory over Williams in five meetings.
It is the eighth career title for Dementieva, who had previously never won a set against Williams.
Russian Nikolay Davydenko beat France's Paul-Henri Mathieu 7-5 7-6 (11-9) in the men's final.
"It's just a great victory for me," said Dementieva. "This has been one of my favourite tournaments and playing at home in front of my fans, finally I was able to do it.
"It is a very important win for me and my whole career."
Williams said: "She just played really unbelievable, she should play like that more often.
"I'm not going to make excuses for myself. I played terrible. I had a feeling that almost every shot I hit, it was out."