Angelique Kerber shocked former champion Petra Kvitova at the WTA Finals on Monday, pulling off an impressive 6-2 7-6 (7-3) victory.
Making her return to the tournament for the first time since 2012, the German has already improved upon her previous showing, where she lost all three of her round robin matches.
Kerber was dominant in the first set, earning two break points in the third and seventh games and converting both of them without facing a single break points against her.
Kvitova rallied in the second set, which lasted almost three times longer than the first and saw the players exchange breaks of serve no less than three times, but the match went Kerber's way in the tie-break as she claimed two decisive mini-breaks.
While Kvitova would end up creating more break point opportunities in the match, 10 to Kerber's seven, she converted only three of them to Kerber's five.
The Czech also made a hefty 44 unforced errors during the match, contributing to her own downfall.
"I'm so happy to win, Petra's an unbelievable player and had a great year. I'm just enjoying playing here, it's my first time here and the fans are amazing," said Kerber afterwards.
"I was trying to move well. I was actually a break down in the first few games and I was just trying to be aggressive. In the end it was very close so I just decided to go for it and I'm very happy that I got the win."