Dominic Thiem advanced to the second round of the BMW Open by American Express on Tuesday in Munich. The former World No. 3 led Constant Lestienne 6-3 and was serving at Ad/40 in the first game of the second set when the Frenchman retired due to a left calf injury.

“It was a surprising end, not the way I wanted,” Thiem said in his on-court interview. “But it’s okay and on to the next one.”

The Austrian is making his first appearance in Munich since 2016, when he reached the final. Thiem is happy to be back at the ATP 250, where he is pursuing his first title since the 2020 US Open.

“Of course I love to play here. The memory of snow in the first round, the break because of heavy snowfall is very funny. I’ll have it in my head forever, so I really like to remember that and also the week in 2016 was great,” Thiem said. “Just a little bit sad when Philipp Kohlschreiber went by with the winner’s car. It was tough, but obviously I love to play here and very happy to be in the second round.”

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Thiem will next play Swiss Marc-Andrea Huesler, who battled past Briton Kyle Edmund 7-6(3), 4-6, 6-3.

Another Swiss, qualifier Alexander Ritschard, eliminated in-form German Jan-Lennard Struff 7-5, 7-5. It was the second tour-level victory of the season for Switzerland United Cup team member Ritschard, who nearly had his right arm amputated when he was 22.

In other action, Hungarian Marton Fucsovics rallied past German wild card Max Hans Rehberg 4-6, 7-6(6), 6-3. A home favourite reached the second round when Oscar Otte defeated Argentine Sebastian Baez 6-3, 7-5.