However, Modric finished well clear of Ronaldo in the voting - which involves coaches and journalists - and Mendes has described the result as "shameful".
Mendes told Record: "Football is played on the field and that's where Cristiano won. He scored 15 goals, carried Real Madrid on his back and conquered the Champions League again.
"It's ridiculous, shameful. The winner is not in doubt, as Ronaldo is the best in his position."
Liverpool's Mohamed Salah finished in third place.