Jankovic secured her first title since August 2009
Jelena Jankovic upset the form book as she cruised to a straight-sets win over Caroline Wozniacki in the final of the BNP Paribas Open at Indian Wells.
Jankovic, seeded sixth, beat second seeded Dane Wozniacki 6-2 6-4.
The Serb secured three breaks of serve in the opening set and broke at the start of the second to clinch her first title since August 2009.
"It's been a great two weeks, really amazing. I'm so happy and so thrilled I was able to win this title," she said.
"I went out there knowing my game plan. I wanted to be really aggressive, but at the same time patient and not really go for too much or go over the limit with some balls.
"I waited for my opportunities, and when I had them, I took them."
Despite her defeat the 19-year-old Wozniacki will now rise to a career-high second in the world rankings.
"When I think back on this tournament, I think I've done a great job - everyone was playing here except for the two Williams sisters," she said.
"It was a strong field, and then coming out as a finalist and then coming out as number two in the world tomorrow (Monday), that's still a great feeling."
Jankovic had endured a below-par season before arriving at Indian Wells for the first Masters Series event of the year and had made a first-round exit in her previous tournament in Monterrey.
But after rediscovering some of her best form in California, the 25-year-old former world number one swept past the rising talent of Wozniacki to win in one hour and 24 minutes.
Wozniacki's cause was not helped in the first set as she won just 30% of points on her first serve.
Jankovic then closed in on the title when she immediately broke in the first game of the second set before holding her serve thereafter to claim her 12th WTA Tour title.