Caroline Wozniacki claimed the biggest title of her career after defeating Venus Williams for the first time to win the BNP Paribas WTA Finals Singapore.
The Dane beat her American opponent, the oldest woman to reach the final at 37, 6-4 6-4 to finish the year as world number three.
"Going into the tournament you know that it's going to be a tough one," Wozniacki told a press conference.
"I'm really proud of how I have played all week and how I have fought and how I really produced some great fighting out there.
"To be here with the trophy means a lot, and it's a great way to finish off the year.
"I was hoping that if I'm going to beat her (Williams) at least once in my career it had to be today. I just went out there and I just did my best."
Former world number one Wozniacki looked to be on course for a comfortable win at 5-0 in the second set only for Williams to rally and take the next four games.
However, the Dane broke her opponent's serve to secure her second title of the year after winning last month's Pan-Pacific Open in Tokyo.
"I was up 5-0, everything was going well, and all of a sudden, Venus just starts upping her game," added Wozniacki.
"She went for her shots, she started serving to my body, and I'm just so happy that I managed to win in the end."
Williams, who won this title nine years ago, accepted she only really performed in patches
"(Wozniacki) played really well the whole match," she said.
"You know, I played well parts of the match and tried my best."