Top seed Alexander Zverev defeated Daniel Altmaier in an all-German matchup at the BMW Open in Munich, winning 6-3, 6-2 in 80 minutes. Zverev converted four of six break points against Altmaier and acknowledged his opponent's capability to challenge top players. Zverev aims to match Philipp Kohlschreiber's Munich title record as he advances to the quarter-finals to face Tallon Griekspoor, who beat Yannick Hanfmann.
In another match, second seed Ben Shelton overcame Dutch lucky loser Botic van de Zandschulp 7-6 (7-1), 6-3 after a competitive first set. Shelton dominated the tie-break and secured victory with a strong start in the second set. He will now play against Italy's Luciano Darderi, who defeated Miomir Kacmanovic in a three-set match.