Flavia Pennetta won the biggest title of her career downing No. 2 seed Agnieszka Radwanska in the Indian Wells final 6-2, 6-1.
"Today was my day and I'm just enjoying this moment," Pennetta said during the trophy ceremony.
Pennetta beat four higher seeded players, including No. 1 seed Li Na, to become the first Italian champion at the BNP Paribas Open.
"After so many years so much work and everything, this is the moment I always waiting for, no?" Pannetta said. "And it's coming when you doesn't expect and everything, because in the beginning of the week I never expect to be the champion or to be in the final or semifinal."
The World No. 21 player took advantage of uncharacteristic errors by Radwanska in the first set.
Radwanska then took a curiously timed medical break right before Pennetta was slated to serve in the second set. The Italian held serve and then quickly converted a break chance to grab control of the second set.
"I'm so sorry I couldn't run. I had a great week and I'll be back," Radwanska said, tearing up after the match.
Pennetta is the 18th different woman to capture the Indian Wells title. It was her first tournament title since 2010.
Pennetta, 32, became just the second player to reach the BNP Paribas Open final and win after turning 30-years-old. Martina Navratilova did it twice. The win will move the Italian to No. 12 in the WTA Tennis world rankings.