Wuhan, Hubei, China, 22 September 2014 | tennis.com.au

Jarmila Gajdosova’s resurgence has continued with an upset victory over 15th seed Flavia Pennetta at the WTA Premier event in Wuhan, China.

Gajdosova, a qualifier, brushed aside the Italian 6-1 6-4 in just one hour and 12 minutes to progress to the second round.

She was joined in the second round by countrywoman Casey Dellacqua, yet another Aussie, Sam Stosur, fell at the first hurdle.

Stosur was unlucky to draw dangerous Czech Karolina Pliskova in her opening match, after the young left-hander had won the WTA title in Seoul at the weekend.

Pliskova proved the superior server throughout the one hour, 24 minute contest, winning 6-4 6-4.

Dellacqua came through a tight encounter with Italy’s Roberta Vinci, winning 7-5 7-5.

She’ll next face Anastasia Pavlyuchenkova, who overcame last week’s Tokyo champion and ninth seed Ana Ivanovic.

Dellacqua quickly opened up a 3-0 lead against Vinci, but although the former world No.11 fought back to 5-5, Dellacqua’s more effective serving helped her through.

For Gajdosova, it was the first time in three career meetings that the 27-year-old had even taken a set off Pennetta.

She has now won three straight matches in the inland Chinese city, and 29 of her past 35 dating back to Nottingham in June.

In the latest rankings released on Monday, she also jumped 12 spots to No.79.

The big-hitting Aussie smacked 10 aces and won 92 per cent of her first-serve points to set up a second-round meeting with Belgian Kirsten Flipkens.