Manchester City failed in an attempt to sign the fullback last January.
And Tudor admits he's delighted being able to count on Cambiaso this season: "He can play as a mezzala (attacking midfielder). He has a different kind of mind, in a good way. As a full-back, he sees things as a midfielder.
"Sometimes he moves inside and feels the positions. I give the guys a little freedom to adapt on the pitch in the best way according to their qualities.
"He's a top-level player. He needs to be more consistent in his performances and he needs to work and grow. It's always up to him.
"He can play at Liverpool , Real Madrid or Manchester City , the best clubs in the world, but he has to say: 'I will come there because every Sunday I am the best'. If he says that, he can go and play there soon."