With the frontman spearheading an exciting Belgium side at the World Cup in Brazil, he will attract interest from big-money clubs.
Martinez said: "He's a grounded and intelligent young man, who is not going to be swayed by the materialistic aspect of the game.
"What can we offer him? Just enjoying his football.
"As a player, happiness is something that is very important. When you can offer football happiness it's an incredible opportunity."
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball