Gabriel Diallo defeated Tristan Boyer in the Round of 32 at the 2026 Mifel Open on Monday, July 27, in Los Cabos, Mexico.
The match was played on hard court at the Corredor Turistico SJC-CSL, an important stop in the ATP hard-court season.
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Diallo, ranked No. 92 in the world, entered as the favorite with a 64.3% implied win probability.
Boyer is ranked No. 166.
Diallo holds a 2026 match record of 8-16 and averages 7.3 aces per match.
Boyer has a 6-3 record this year and averages 7.8 aces per match.
Diallo is a Canadian professional who reached a career-high singles ranking of No. 33 in August 2025.
He is currently the third-ranked Canadian singles player and won an ATP title at the 2025 Libéma Open.
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Boyer is an American player with a career-high singles ranking of No. 106, achieved in September 2025.
In their head-to-head history, Diallo leads 2-0, having won both previous meetings at challenger-level events in 2024.
Diallo began his North American hard-court season after an early exit at Wimbledon 2026. He has a 61% win rate on hard courts.
Boyer entered the main draw after a walkover win and a qualifying victory. He has a 53.9% win rate on hard courts this season.
Analyst Lou Aguila of SportyTrader.
com noted that Diallo is 6-8 in first-round matches in 2026, while Boyer is 0-1 against top-100 players this year and 4-4 on hard courts.
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The match was predicted to end in straight sets, with a scoreline of 6-3, 6-4, which proved accurate.
