Stanford - Seventh seeded American Madison Keys crashed out of the WTA Tour's Stanford tournament, losing 1-6, 6-4, 6-1 to Ajla Tomljanovic in a second round match on Wednesday.
Keys breezed through the first set in just 23 minutes but then lost serve early in the second set and dropped a 25 minute third set to Croatia's Tomljanovic.
In the other night match, eighth seeded Elina Svitolina swept past American qualifier Nicole Gibbs 6-3, 7-6 (7/5) to reach the quarter-finals.
In other matches, Alison Riske defeated Carla Suarez Navarro 6-4, 6-4 and Mona Barthel beat No.6 seed and fellow German Andrea Petkovic 5-7, 6-2, 7-6 (7/4).
Results from Stanford WTA tournament on Wednesday:
Mona Barthel (GER) bt Andrea Petkovic (GER x6) 5-7, 6-2, 7-6 (7/4)
Alison Riske (USA) bt Carla Suarez (ESP x3) 6-4, 6-4
Ajla Tomljanovic (CRO) bt Madison Keys (USA x7) 1-6, 6-4, 6-1
Elina Svitolina (UKR) bt Nicole Gibbs (USA) 6-3, 7-6 (7/5)