Overview

• Altmaier won 7:6, 1:6, 4:6, 6:3, 7:5 in 4 hours 21 minutes and saved a match point at 4–5 in the fifth set.
• At the net, Tsitsipas criticized an underarm serve used early in the fourth set, and Altmaier later defended the tactic as legitimate in high-intensity matches.
• Next up for Altmaier is No. 8 seed Alex de Minaur, a speed-focused opponent likely to test his recovery.
• Alexander Zverev moved into round three by beating Jacob Fearnley 6:4, 6:4, 6:4, with Laura Siegemund also advancing.
• Germany entered only six players in this US Open, the fewest since 1983, putting extra spotlight on the veterans still in the draw.