Leonardo Martín Mayer is a former professional tennis player from Argentina. Mayer achieved a career-high singles ranking of world No. 21 in June 2015 and world No. 48 in doubles in January 2019. He was coached by Alejandro Fabbri and Leo Alonso. He was born in Corrientes and resides in Buenos Aires.

Corrientes is the capital city of the province of Corrientes, Argentina, located on the eastern shore of the Paraná River, about 1,000 km (621 mi) from Buenos Aires and 300 km (186 mi) from Posadas, on National Route 12. It has a population of 346,334 according to the 2010 Census. It lies opposite its twin city, Resistencia, Chaco.