Canada's Félix Auger-Aliassime needed to rally from down a set and go the distance to solve Germany's Maximilian Marterer in the opening round of the BMW Open.
The 23-year-old from Montreal topped Marterer 6-7(5), 7-6(6), 7-6(3) on Tuesday in Munich.
Auger-Aliassime, who is the fifth seed in the tournament, fired 11 aces, won 78 per cent of first-serve points and converted two of eight break point opportunities. He also committed five double faults.
Marterer made four aces with two double faults.
Auger-Aliassime will now face Japan's Taro Daniel in the second round Wednesday.
Daniel advanced with a 6-3, 6-4 win over Australia's Christopher O'Connell.
Auger-Aliassime is the lone Canadian in the men's singles tournament.
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