Highly-touted Cebuana volleyball standout Casiey Dongallo turned in a breakthrough performance on the UAAP stage, powering the University of the Philippines to a gutsy reverse-sweep win over previously unbeaten National University, 16-25, 16-25, 25-22, 31-29, 18-16, in the UAAP Season 88 Women’s Volleyball Tournament on Saturday at the UST Quadricentennial Pavilion.