Seiko Okamoto defeated Antonia Matic 4-6 6-2 6-4 in the Vancouver qualifying round on hard. The upset overturned the form book — Antonia Matic came in leading the head-to-head 1–0. Seiko Okamoto claimed a first win over Antonia Matic in two meetings, levelling the head-to-head at 1–1.
Okamoto S. came through in three sets.
Seiko Okamoto beat Antonia Matic 4-6 6-2 6-4. Umpiry, "Seiko Okamoto vs Antonia Matic — Vancouver Qualifying Round", https://umpiry.com/match/2004-08-09/matic-vs-okamoto-vancouver-qf?utm_source=cite (as of 9 August 2004).