In what was probably his last appearance in Munich, veteran Philipp Kohlschreiber lost the German generational duel with Daniel Altmaier.

The 38-year-old from Augsburg lost to his 15-year younger opponent in the first round on Monday with 6:7 (5:7), 6:3 and 1:6. After almost two and a half hours Altmaier used his second match point.

On the centre court in Munich, a not always high-class but often exciting first-round match developed. After Kohlschreiber had squandered an early lead, the former world number 16 fought his way into the third set thanks to well-placed topspin shots. In the end, there was not enough energy and Altmaier made it into the last 16 with a backhand winner.

Kohlschreiber has won the traditional event at Iphitos three times so far and is at the end of his long career. In the winter, he had announced that he would definitely go “full throttle” until the grass-court classic in Wimbledon in June.

Olympic champion Alexander Zverev will start the tournament on Wednesday. Youngster Max Rehberg has already been eliminated after losing 2:6, 3:6 to Serbian Miomir Kecmanovic. Oscar Otte from Cologne is the third German besides Zverev and Altmaier still in the tournament.