Melbourne: Daria Gavrilova continues to fly the flag for her newly adopted nation at the Australian Open, stunning sixth-seed Petra Kvitova to march on to the third round.

Gavrilova upset the two-time Wimbledon winner 6-4 6-4 in 89 minutes to book a date with Kristina Mladenovic in the last 32 at Melbourne Park.

The 21-year-old, who was born in Moscow but confirmed her switch of allegiances to Australia late last year, produced a sparkling display on Margaret Court Arena.