Elias Ymer defeated Mackenzie Mcdonald 7-6 4-6 6-4 in the Acapulco qualifying round of 16 on hard. The upset overturned the form book — Mackenzie Mcdonald came in ranked #169, leading the head-to-head 2–0. Elias Ymer claimed a first win over Mackenzie Mcdonald in three meetings, narrowing the head-to-head to 2–1.
Ymer E. came through in three sets.
Elias Ymer beat Mackenzie Mcdonald 7-6(7) 4-6 6-4. Umpiry, "Elias Ymer vs Mackenzie Mcdonald — Acapulco Qualifying Round of 16", https://umpiry.com/match/2026-02-21/mcdonald-vs-ymer-acapulco-q16?utm_source=cite (as of 21 February 2026).