Tereza Valentova defeated Alexandra Eala 6–1, 6–2 in the first round of the WTA 250 event in Osaka on hard court, confirming her status as pre-match favourite with odds of 1.51 to Eala's 2.67. Valentova's commanding performance saw her claim both sets with relative ease, establishing an early break and maintaining control throughout. Eala, seeded lower in the betting markets, struggled to impose her game and found few answers to Valentova's rhythm. The Czech player's straightforward victory extends her momentum in the tournament and positions her favourably for the second round.