Wigan defender Gary Caldwell believes Roberto Martinez has the potential to become one of the best managers around.
Martinez has informed Wigan chairman Dave Whelan that he wants to leave the club in the wake of their relegation from the Premier League.
Everton have been strongly linked with a move for Martinez as they search for a replacement for David Moyes and Caldwell is a huge admirer of the Spaniard.
"He wants to play football the right way and gives players the freedom to do that and gives you great belief in what you are trying to do," Caldwell told Sky Sports News.
"I think tactically he is one of the best I have worked with. I think he showed that in the Cup final playing against a great Man City team, I think tactically he out-thought Mancini on the day and he won that battle, and I think he can do that in most games.
"He thinks about the game, he is very passionate about the game and players respond to him and give him all they've got.
"I think definitely he has got the potential to do that [become a top manager].
"He is a very young manager still and has got a lot of experience behind him, and that can only be good for him and furthering his career."