The 35-year-old forward has been marked by Cruzeiro when he played for Atlético-MG, a team he helped win two state titles against the same opponent.
Hulk's recent form has caught the attention of Fluminense, who are looking to turn their fortunes around in the Brasileirão. The team has seven consecutive clássicos without winning, with four draws and three losses.
A win against Vasco in the upcoming match could give Fluminense a much-needed boost before their Libertadores quarterfinals against Platense. The team occupies the fourth position in the Brasileirão with 42 points.