Melanie Oudin out at Aegon Classic
The 80th-ranked Oudin struggled in cold and windy conditions in central England, failing to handle the dominant serve of Tomljanovic. The Croat will play top-seeded Kirsten Flipkens.
Oudin beat Jelena Jankovic in straight sets in last year's final of the grass-court tournament, winning her only WTA title. The 21-year-old was a quarterfinalist at the 2009 U.S. Open but has struggled with her consistency since.