Victoria Mboko defeated Elena Rybakina 1–6, 7–5, 7–6 in the semi-final of the WTA Montreal Masters 1000 on hard court on 6 August 2025, pulling off a significant upset against the pre-match favourite. Rybakina dominated the opening set with a commanding 6–1 victory, but Mboko recovered composure in the second, edging a tight 7–5 contest to force a decider. The final set went to a tiebreak, where Mboko's resilience proved decisive as she secured the 7–6 victory to advance to the final. This reversal from a set down represents a crucial breakthrough for Mboko at the Masters 1000 level and marks a notable loss for Rybakina in a late-stage tournament match.