Stockholm, Sweden (SportsNetwork.com) - Top seed and former champion Tomas Berdych was an easy second-round victor Thursday at the Stockholm Open tennis tournament.
The Czech star and 2012 titlist got past German qualifier Dustin Brown 7-5, 6-3 on the indoor surface at Kungliga Tennishallen.
Berdych will face Romanian qualifier Maris Copil in Friday's quarterfinals.
A series of upsets occurred when France's Adrian Mannarino knocked out fourth- seeded Ukrainian Alexandr Dolgopolov 6-4, 6-7 (2-7), 7-6 (7-4), German qualifier Matthias Bachinger dismissed fifth-seeded Argentine Leonardo Mayer 7-6 (7-3), 6-7 (4-7), 6-3, and improving American Jack Sock vanquished sixth- seeded Frenchman Jeremy Chardy 7-6 (7-3), 6-3. Sock is rewarded with a quarterfinal bout against second-seeded reigning champ Grigor Dimitrov, who beat Spanish star David Ferrer in last year's Stockholm finale for his first- ever ATP title.
Also on Day 4, Copil erased French qualifier Pierre-Hugues Herbert 6-4, 6-3.
The other quarters will pit seventh-seeded Spaniard Fernando Verdasco against Aussie Bernard Tomic and Mannarino versus Bachinger.
This week's winner will earn $120,000.
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