MELBOURNE, Australia – Playing in the Australian Open under the local flag for the first time, Daria Gavrilova pulled off the upset of the night, shocking the No.6 seeded Petra Kvitova 6-4, 6-4 on Margaret Court Arena.

Gavrilova – who scored wins last year over Maria Sharapova, Ana Ivanovic and Lucie Safarova and was voted WTA’s Most Impressive Newcomer – wasn’t intimidated by the two-time Wimbledon champion across the net. And with the yellow-clad Aussie crowd firmly behind her, the 21-year-old was relentless.

“It was unreal,” a smiling Gavrilova said to the crowd after the win. “I was so nervous in the end… you probably could tell!”

In the second set, Gavrilova surged to a 5-2 lead and actually had a match point at 5-3 on her serve, but her nerves got the best of her and she sent a backhand into the net.

When the match point came again at 5-4, Gavrilova used a different tactic.

“In that last game I told myself, ‘You’re actually down 5-3 and you’re trying to stay in the match,'” Gavrilova said. “And obviously that helped.”

Kvitova did her best to tamp down her surging opponent and silence the raucous Aussie crowd, but her unforced errors got the best of her. The Czech’s reliable groundstrokes and serve became vulnerable: she hit 35 errors to 17 winners and seven double faults, including one when she was serving to stay in the match.

Gavrilova, who began competing for Australia in 2015, was feeling the Aussie spirit even down to her fingernails, which were painted royal blue and featured Australian flag designs.

“You guys are crazy!” she laughed, thanking the crowd who had been cheering and chanting for her all match long. “But obviously good crazy – you helped me a lot. It was unreal, I’m just really proud.”

Gavrilova now stands alone as the single Australian woman left in the draw – Ajla Tomljanovic, Samantha Stosur, Storm Sanders, Priscilla Hon, Maddison Inglis, Kimberly Birrell, Jarmila Wolfe and Tammi Patterson were all defeated in the first round.

With the win, Gavrilova improves to a 4-10 record against Top 10 players and is into the third round of a Grand Slam for the first time. She’s set to play the No.28 seed Kristina Mladenovic in what will be the pair’s first meeting.