The UFC Fight Night card will take place at the Adelaide Entertainment Center in Australia.
Nguyen (16-7) looks to rebound from third-round submission loss to Jussier Formiga in February that snapped a two-fight winning streak over Geane Herrera and Tim Elliott. “Ben 10” is 4-2 in the UFC and 10-2 over his past 12 bouts.
Reis (22-9) is a former title challenger who finds himself in a must-win situation after losing three in a row in the Octagon. He was finished by Demetrious Johnson and Henry Cejudo prior to a decision defeat to John Moraga.
The UFC has yet to announce a headliner for the event.