Cibulkova thrashes teenager Birrell in Hobart, Barthel through

Third seed Dominika Cibulkova needed just 48 minutes to seal her place in the quarter-finals of the Hobart International at the expense of teenage wildcard Kimberly Birrell on Wednesday.

Queenslander Birrell claimed her first Tour-level victory by seeing off Danka Kovinic in the first round on Monday, but the 17-year-older was brought back down to earth by a 6-1 6-0 defeat to 2014 Australian Open runner-up Cibulkova.

World number 37 Cibulkova.was a class apart from her inexperienced opponent, losing only 11 points in an opening set which lasted just 22 minutes.

Birrell had three break points in the fourth game of the second set, but was unable to take them and failed to win a solitary point in the final two games as Cibulkova won at a canter.

Mona Barthel, winner of this tournament four years ago, also advanced with a straight-sets triumph over qualifier Naomi Osaka.

The ninth seed from Germany won 7-6 (7-2) 6-2, taking all three of her break-point opportunities to set up a last-eight encounter with Alize Cornet.

Kiki Bertens will be Cibulkova's next opponent after the world number 103 ousted Annika Beck, ranked 47 places higher than her, 6-3 6-1.

Defending champion Heather Watson and Monica Niculescu will complete their last-16 match on Thursday after rain stopped play with the Brit leading 3-1 in the final set.

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