Roberto Martinez says Everton have a wonderful chance of keeping Romelu Lukaku... because they put a smile on his face. The Chelsea forward has become one of Europe’s most wanted strikers during his Goodison loan spell, with speculation mounting Jose Mourinho will sell him in the summer. 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.” Lukaku inspired Everton’s massive 3-0 win over Arsenal and they will leapfrog the Gunners into fourth place and a Champions League place if they win at Sunderland this weekend.