Marta Kostyuk def. Katherine Sebov 7(7)-6(4), 6-0 — Canadian Open 2026 R64

Match recap

Marta Kostyuk defeated Katherine Sebov 7(7)-6(4), 6-0 in the R64 of the Canadian Open 2026.

The first-serve split did the sorting. Down 4-1 in the opener after Sebov broke in game 5, Marta Kostyuk won 71 percent of first-serve points to Katherine Sebov's 41 and converted 6 of 7 break points, dropping no games after the first-set tiebreak. The No. 10 seed needed just 78 minutes in her first outing since a Wimbledon semifinal run, a tidy restart against an opponent she'd never faced on record.

Match stats

Marta Kostyuk: 5 aces, 39% first serves, 7 double faults, 6/7 break points. Katherine Sebov: 0 aces, 68% first serves, 6 double faults, 3/5 break points.

Profiles: Marta Kostyuk · Katherine Sebov — Canadian Open 2026

Head-to-head

This is the first meeting between Marta Kostyuk and Katherine Sebov.