Earlier in the day Slovakia's Lukas Lacko, who stepped in after an exhausted Roger Federer withdrew, overcame Israel's Harel Levy 7-6 (8-6) 6-2 to book a second-round meeting with Andreas Beck.

BBC: Haas ends Tsonga's Halle campaign

Fifth-seeded Tomas Berdych beat Guillaume Rufin of France 6-2, 6-2, 6-4 and eighth-seeded Janko Tipsarevic beat Lukas Lacko 6-3, 6-4, 3-6, 4-6, 7-5 in a match that lasted nearly four hours.

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Spain's David Ferrer , the No. 6 seed, had little trouble against Slovakia's Lukas Lacko, winning 6-3 6-4 6-1 but Serbia's Janko Tipsarevic was made to work harder in a 2-6 6-4 7-6 6-3 success over American Sam Querrey.

CNN: STORY HIGHLIGHTS