Yasutaka Uchiyama defeated Adolfo Daniel Vallejo 4-6 6-3 6-4 in the Australian Open qualifying round of 64 on hard. The upset overturned the form book — Adolfo Daniel Vallejo came in ranked #52.
Uchiyama Y. came through in three sets.
Yasutaka Uchiyama beat Adolfo Daniel Vallejo 4-6 6-3 6-4. Umpiry, "Yasutaka Uchiyama vs Adolfo Daniel Vallejo — Australian Open Qualifying Round of 64", https://umpiry.com/match/2025-01-08/uchiyama-vs-vallejo-australian-open-q64?utm_source=cite (as of 8 January 2025).