TULSA, Okla. ? California's Filip Bergevi ? attempting to reach the main singles draw at the 2015 Saint Francis Health System ITA Men's All-American Championships ? fell in the qualifying singles round of 64 on Tuesday to Northwestern's Konrad Zieba.

Seeded eighth and ranked 64th in the ITA preseason poll, the Golden Bear junior lost in an upset to Zieba, 7-6(7), 6-2, at the University of Tulsa's Michael D. Case Tennis Center.

Cal juniors Florian Lakat and Andre Goransson open play in main draw singles and main draw doubles on Thursday at the All-American. Goransson is ranked 22nd in singles, Lakat is ranked 36th in singles and the pair is ranked 25th in doubles.