Thirty-two players started on qualifying weekend at the Monterrey Open, including Jovana Jaksic.
Jaksic faced Sachia Vickery in a match between teenagers - Vickery is a 17-year-old American rising star.
But 19-year-old Serb Jaksic wound up prevailing over Vickery in a tough three-setter, 63 57 63.
Another young American, Asia Muhammed, was among those playing the first round of qualifying.
But Spanish veteran Laura Pous-Tio closed Muhammed out with a second set tie-breaker, 63 76(5).
Another American teenager, Nicole Melichar, had few problems with Britain's Jennifer Allan, 61 63.
Russian left-hander Margarita Lazareva served it up with the linesperson watching carefully...
Lazareva was squaring off with Allie Will, an American whose career titles have all come in doubles.
But Will was a force to be reckoned with in this singles match, cruising past Lazareva, 62 60.
Mexican teenager Marcela Zacarías pulled off an upset later on, beating Olga Savchuk, 75 75.
Stéphanie Dubois was among the winners on Day 2, in straight sets for the second day in a row.
And the same for Alla Kudryavtseva - winning both first and second round qualies in straight sets.
Kudryavtseva would end up beating Dubois in the final round of qualifying on Monday, 63 63.
Will would also win her second round match but would fall in the final round to Tereza Mrdeza, 61 61.
Jaksic and American junior star Samantha Crawford would round out the four qualifiers in Monterrey.