Berdych, del Potro advance in Rotterdam
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Former Wimbledon runner-up Tomas round winners Wednesday at the $1.6 million ABN AMRO World Tennis Tournament.
The second-seeded Berdych blew past Czech Lukas Rosol 6-4, 6-2, while a third- seeded del Potro held off French left-hander Michael Llodra 6-4, 6-7 (3-7), 6-4 on the indoor hardcourts at Ahoy Rotterdam.
Berdych titled in France two weeks ago.
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Finnish veteran Jarkko Nieminen reached the quarterfinals here with a 6-3, 5-7, 7-6 (7-2) second-round victory over Poland's Lukasz Kubot.
Additional opening-round wins came for Cypriot Marcos Baghdatis, Russian Alex Bogomolov Jr. and Slovakian qualifier Karol Beck. The former Australian Open runner-up Baghdatis got past German Matthias Bachinger 7-6 (7-2), 6-2 on Day 3.
Wednesday's schedule also features a match for top-seeded former world No. 1 Roger Federer, who will face Frenchman Nicolas Mahut in his opener. Federer was the Rotterdam titlist the last time he played here back in 2005.
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The 2012 Rotterdam winner will collect $385,000.