Shintaro Mochizuki defeated Roman Andres Burruchaga 6-4 1-6 6-4 in the US Open qualifying round of 64 on hard. The upset overturned the form book — Roman Andres Burruchaga came in ranked #62, but Shintaro Mochizuki had been the form player, winning 1 of their last 4 on hard. Shintaro Mochizuki moved ahead in the head-to-head, 2–1.
Mochizuki S. came through in three sets.
Mochizuki S. and Burruchaga R. faced 1 of the same opponent in the last 12 months. Mochizuki S. went 0–1 (0%) against them, Burruchaga R. 0–1 (0%).
Only 1 common opponent — too few for any conclusion. Shown without assessment.
Hard: Mochizuki S. leads 2–0 · Clay: Burruchaga R. leads 1–0
Shintaro Mochizuki beat Roman Andres Burruchaga 6-4 1-6 6-4. Umpiry, "Shintaro Mochizuki vs Roman Andres Burruchaga — US Open Qualifying Round of 64", https://umpiry.com/match/2025-08-21/burruchaga-vs-mochizuki-us-open-q64?utm_source=cite (as of 21 August 2025).