Desalu's first international medal came at the 2013 European Athletics Junior Championships, where he was a relay bronze medallist on home turf in Rieti, running the anchor leg on a team of Giacomo Isolano, Lorenzo Bilotti and Roberto Rigali. He also managed fifth place individually in the 200 m. His first senior medal followed at the 2014 European Team Championships, where he was part of the bronze medal-winning relay quartet alongside Massimiliano Ferraro, Diego Marani, and Delmas Obou. He was selected both individually and for the relay for Italy at the 2014 European Athletics Championships. He was a semi-finalist in the 200 m, having set a best of 20.55 seconds in the heats, and was a finalist in the relay with Fabio Cerutti, Marani and Obou (although the Italians failed to finish).