Daniel Altmaier

At eleven Altmaier changed coaches, hit a few balls both ways, and told the new coach he preferred one hand. He has said publicly that the one-hander gives him more variety than two-handed opponents. As a qualifier he reached the Roland-Garros fourth round in 2020, and he went back there in 2023 to beat Jannik Sinner in a five-set second round. He hit a career high of 44 in January 2026, and as of November 2026 he had yet to win an ATP title.