Ruslan Tiukaev will upset Kristian Vukovic to advance in the ITF M15 Kursumlijska Banja. Tiukaev is a 21-year-old from Penza with a career high ranking of 959, and he will be trying to rebound after his previous 0-2 loss to Lorenzo Bocchi. The match is scheduled on August 19, 2026, and a win would…