[4] In March 2011,[5] Fortuna knocked out Florida prospect Derrick Wilson to win the WBC Youth Intercontinental Featherweight Championship.
On the undercard of Manny Pacquiao vs. Juan Manuel Marquez IV on December 8, 2012, Fortuna faced previously unbeaten Irish fighter Patrick Hyland for the WBA Interim Featherweight Title.
Fortuna seemed to fade late but had built enough of an early lead to earn a unanimous decision, and hand Hyland his first loss as a professional fighter.
[7] On the undercard of Amir Khan vs. Chris Algieri on May 20, 2015, Fortuna faced the Costa Rican Bryan Vázquez for the WBA (Regular) Super Featherweight Title.
Fortuna was supposed to face Luke Campbell on April 17, 2020 for the vacant WBC lightweight title, but the fight was cancelled due to the coronavirus pandemic.