Querrey, del Potro exit Sydney

Sports Network

, Last Updated: 2:09 PM ET

SYDNEY, Australia -- Ukrainian Alexandr Dolgopolov surprised top-seeded American Sam Querrey and former U.S. Open champ Juan Martin del Potro came up a loser in second-round action Wednesday at the $450,000 Sydney International, a final Australian Open tune-up.

Dolgopolov actually took part in two matches Wednesday. He needed to finish a first-round match against Bernard Tomic that was delayed by rain, and posted a 6-7 (3-7), 6-1, 6-2 victory against the Aussie.

He had a considerably easier time against Querrey, recording a 6-4, 6-3 win to reach the quarterfinals.

Meanwhile, German Florian Mayer notched a 6-2, 7-5 win over the former top- five star del Potro, a wild card this week. Del Potro is coming back from right wrist surgery, and participated in just three tournaments last year because of an injury suffered at the 2010 Aussie Open.

Frenchman Gilles Simon pulled off the same trick as Dolgopolov on Day 3, as he closed out a 6-0, 6-3 first-round victory over eighth-seeded Yen-Hsun Lu of Taipei, then beat Portuguese qualifier Frederico Gil 6-1, 6-3 in second-round play.

Third-seeded Ernests Gulbis survived, but needed three sets to do so against Russian qualifier Igor Andreev. The Latvian Gulbis triumphed 2-6, 6-4, 6-3 in round two.

Also on Wednesday, fourth-seeded Serbian Viktor Troicki got past Argentine Juan Ignacio Chela 6-2, 6-3 and fifth-seeded Richard Gasquet of France was a 3-6, 7-5, 6-4 second-round winner against Italian Andreas Seppi.

Ukrainian Sergiy Stakhovsky ousted seventh-seeded Spaniard Guillermo Garcia- Lopez 6-3, 6-4 and Italian Potito Starace got past Lukasz Kubot of Poland 7-6 (7-5), 2-6, 6-3.

Thursday's quarters will pit Gulbis against Stakhovsky, Troicki versus Gasquet, Mayer against Starace and Dolgopolov versus Simon.


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