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Challenger of Dallas reaches quarters

The unseeded Jesse Levine and Denis Kudla are the lone Americans who have managed to make it through to the quarterfinals of the $100,000 yp Challenger of Dallas men's tennis tournament.

Building on his wild-card appearance in last month's Australian Open, Levine advanced to the final eight Wednesday with a 6-4, 6-1 dismantling of No. 5 seed Wayne Odesnik in a second-round match at T Bar M Racquet Club.

In Thursday's quarterfinals, Levine will face Australian qualifier Carsten Ball, who followed up his first-round dismissal of top-seeded Ryan Sweeting with a 7-6 (7-5), 7-6 (7-3) victory over 2005 U.S. Open semifinalist Robby Ginepri.

Kudla, meanwhile, advanced to a quarterfinal matchup with Germany's Stefan Seifert by posting a 6-3, 5-7, 6-2 victory over Seifert's countryman Mischa Zverev.

American teenager Jack Sock, however, fell short of joining Levine and Kudla in the quarterfinals when a bout with dehydration forced the wild-card entrant to retire in the final set of his second-round match with sixth-seeded Izak Van Der Merwe.

Sock overcame an abdominal injury Tuesday to outlast American veteran Robert Kendrick in a first-round slugfest, but a case of suspected food poisioning later in the evening sent the 19-year-old to the hospital overnight. Sock tried to play Wednesday against Van Der Merwe after receiving fluids but ultimately retired when trailing 6-1, 4-6, 3-0.

Van Der Merwe will face Clement Reix in the quarterfinals after the French qualifier outlasted another American, Alex Kuznetsov, for a 2-6, 7-5, 7-6 (7-3) win in the closest match of the tournament to date.

The other quarterfinal will pit the highest remaining seed, No. 2 Steve Darcis of Belgium, against Lithuania's eighth-seeded Ricardas Berankis. Darcis advanced with a 6-2, 7-5 victory over Great Britain's Alex Bogdanovic. Berankis scored a 6-4, 6-4 triumph over Germany's Andre Begemann.