Carlos Alcaraz defeated Sebastian Baez 6–4, 6–2 in the first round of the ATP 250 Tokyo tournament on hard court, confirming his status as the overwhelming pre-match favourite with odds of 1.01 to Baez's 17.87. The Spanish top seed controlled the match throughout, breaking serve decisively in both sets to secure a comfortable victory. Alcaraz's commanding performance in the opening round suggests he remains in strong form as the tournament progresses toward the latter stages.