[1] He was part of the Argentine team that won gold in men's field hockey at the 2016 Summer Olympics in Rio de Janeiro.

Masso was born in Brussels, Belgium to an Argentine-born father, Eduardo, and a Belgian mother, Sabrina Merckx.

His father Eduardo Masso is a former tennis player who represented Belgium at the Davis Cup.

His maternal grandfather is the Belgian former cycling champion Eddy Merckx, a five-time Tour de France winner.

His maternal uncle, Axel Merckx, is an Olympic bronze medalist in cycling for Belgium.