Born in Castelnovo ne' Monti in the province of Reggio Emilia, Mercati was a highly regarded product of the academy at Sassuolo and made 98 career appearances from three loan spells in Serie C before joining AKFC in August 2024.
Mercati made 30 appearances (20 starts) in the Super League in 2024/25, and was second in the league in tackles per game (3.0).