German wild cards Tommy Haas and Florian Mayer upset third seeds Florin Mergea of Romania and Aisam-Ul-Haq Qureshi of Pakistan 7-6(5), 2-6, 10-7 on Monday at the MercedesCup in Stuttgart.
Haas, 39, and Mayer, 33, saved four of seven break points and will next meet Marcin Matkowski of Poland and Max Mirnyi of Belarus. Matkowski/Mirnyi beat Spaniard David Marrero and Frenchman Benoit Paire 4-6, 6-3, 10-4.
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