Stosur reaches Osaka quarters

Published February 05, 2015

Osaka, Japan (SportsNetwork.com) - Defending champion Samantha Stosur notched a second-round victory Thursday at the Japan Women's Open tennis event.

The top seed was leading fellow Aussie Jarmila Gajdosova 7-6 (7-4), 1-0 when Gajdosova retired on Day 4 on the hardcourts at Utsubo Tennis Center.

The Osaka stalwart Stosur beat Canadian Eugenie Bouchard in last year's final, was the inaugural Osaka titlist in 2009, and was the runner-up here in 2011.

Stosur's quarterfinal opponent will be Kazakhstan's Yulia Putintseva.

A Thursday upset came when little-known Croat Ana Konjuh ousted fourth-seeded American Coco Vandeweghe 6-2, 3-6, 6-3.

Also on Day 4, fifth-seeded Zarina Diyas of Kazakhstan whipped Spaniard Lara Arruabarrena 6-0, 6-1 and eighth-seeded American Lauren Davis leveled Japanese qualifier Shuko Aoyama 6-1, 6-1.

Friday's other quarterfinals will pit second-seeded American Madison Keys against Thai Luksika Kumkhum, third-seeded Ukrainian Elina Svitolina versus Davis, and Diyas against Konjuh.

The 2014 Osaka champ will collect $43,000.

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