Christian Oliva made his debut with the Nacional's first team during the Supercopa Uruguaya, an annual competition in Uruguay.
He made his professional debut late in the month, coming on as a second-half substitute for Luis Aguiar in a 31 loss against Penarol, for the year's Supercopa Uruguaya. The Supercopa Uruguaya (Uruguayan Supercup) is an annual one-match football official competition in Uruguay organised by the Uruguayan Football Association (AUF) which is played between the Primera Division champions and the Torneo Intermedio winners of the previous season, starting from 2018. 
