Eighth seed Caroline Wozniacki beat fifth-seeded Venus Williams in straight sets to win the WTA Finals title in Singapore on Sunday.
In a match lasting one hour and 30 minutes, the 27-year-old Dane beat her 37-year-old opponent 6-4, 6-4 on the hard courts of the Singapore Indoor Stadium.
This was Wozniacki's first victory against her American counterpart in eight meetings.
After her victory, Wozniacki said: "It feels amazing, I can't believe I am here as the winner," she told BT Sport.
"Venus Williams is a great champion and she made it very, very difficult for me. This is my biggest title to date."
In the opening set, there were a total of five breaks of serve but Wozniacki was able to claim the vital break in the tenth game to win the set 6-4.
Wozniacki started the next set by holding serve and then breaking her opponents and then broke again to go on and lead 5-1.
It was clear that Williams had a lot of fight left in her as she claimed Wozniacki serve to trail 2-5.
The American then held her own serve and broke again to trail 4-5 with her serve to follow.
But Wozniacki knuckled down in the tenth game and managed to convert her second match point to win the set and match 6-4.