Samantha Stosur has crashed to her 14th first-week loss at Wimbledon, losing to grasscourt specialist Sabine Lisicki in straight sets.

Stosur admitted she was powerless to stop the German juggernaut from adding to her Wimbledon woes, with yet another premature exit from the tennis showpiece.

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Runner-up in 2013, Lisicki delivered a serving masterclass to consign the French Open semi-finalist to a 6-4 6-2 second-round defeat, her 14th first-week defeat at the All England Club.

Meanwhile, fellow Aussies Bernard Tomic and John Millman moved into the third round, but both face tough matches, while Daria Gavrilova has been bounced out with a second-round loss to 19th seed Dominika Cibulkova.

Bernard Tomic faces Roberto Bautista in the third round. Photo: Getty.

While eight double-faults undermined Stosur’s challenge, Lisicki – owner of the fastest recorded serve in women’s tennis history – was almost untouchable on her monster delivery.

The German only lost two of 22 points on serve in the first set to set the tone and finished off Australia’s 14th seed with her 11th and 12th aces.

“When she’s hitting the line on those serves, even if I went the right way, I wasn’t going to reach them very good,” Stosur said.

“Yeah, when you’re serving out a match like she was and you can serve like that, it’s fantastic, seems very easy.

A three-time semi-finalist in addition to her march to the title match three years ago, Lisicki snuffed out Stosur’s gallant fightback attempt early in the second set to break the Queenslander with two scorching returns.

Nick Kyrgios and Matt Barton are the two Australians in second-round Wimbledon action on Friday (London time), while John Millman will have his work cut out against Andy Murray on Saturday. Also in the third round, Bernard Tomic faces a tough match against Spanish 14th seed Roberto Bautista.

– with AAP