Victoria Mboko defeated Bianca Andreescu 6–3, 6–3 in the first round of the WTA 250 event in Tokyo on hard court. The result constituted an upset, as Andreescu entered as the pre-match favourite at 1.83 odds to Mboko's 2.05. Mboko's dominant performance—winning both sets by identical margins—suggests strong form and court positioning throughout the encounter. The Canadian's loss on hard court in Japan marks a setback in what may be a challenging phase of her season, whilst Mboko advances to the second round with considerable momentum from a comprehensive victory.