Overview
- Struff edged Rune 7-6 (7-5), 2-6, 6-3, 4-6, 7-5 in 3 hours 25 minutes, sealing victory with his 28th ace.
- The German entered through qualifying after falling to No. 144 earlier this season and was kept alive there by a rain-delayed match he turned around.
- He will face No. 17 seed Frances Tiafoe in the third round in New York.
- The victory is his first over a top‑20 opponent this year, driven by assertive serving, net approaches and composure on Court 17.
- The run is set to boost his ranking toward the low 100s, according to points projections reported from the tournament.