The match, which the Swede leads 2-0 in the best of five sets, will resume on Tuesday.

Sverigeettan Ymer, ranked 88 in the world, won the first set with 6-3 and the second set with 7-5 against the 61-ranked German.

For the winner between Ymer and Altmaier, 13-ranked Jannik Sinner awaits in the second round.

The tenth-seeded Italian, at Wimbledon, defeated the Swiss veteran Stan Wawrinka with the set numbers 7-5, 4-6, 6-3, 6-2 in his match in the first round.