Nicole Gibbs dropped a 6-0, 2-6, 6-2 match to top-seeded Marina Erakovic of New Zealand on the final day of qualifying Monday, ending her bid to join former Stanford teammate Mallory Burdette in the main draw of the Southern California Open.
Gibbs learned earlier in the day that she had reached a career-high No. 166 in the WTA rankings following her performance in the Bank of the West Classic last week.
Her match with Erakovic last two hours, 17 minutes.
Burdette, currently ranked 80th, lost a two-hour battle to 16th-ranked Jelena Jankovic of Serbia on Monday night, 4-6, 6-1, 6-4.
Burdette held a 4-3 lead in the third set before Jankovic rallied.
Jankovic, who has appeared at the Bank of the West Classic in the past, is a former world No. 1 with 13 career titles to her credit and prize money of over 14 million dollars.
In Vancouver, Stanford sophomore Krista Hardebeck also dropped a tough three-set match in the final qualifying round.
Hardebeck lost 5-7, 6-2, 6-2 to Great Britain's Jade Windley in the $200,000 Odlum Brown Vancouver Open.