Roberto Martinez has backed Romelu Lukaku to be best in the world and top the EPL goalscoring charts.
Lukaku has 15 goals so far and tops the charts alongside Jamie Vardy of Leicester.
But Martinez is glad Lukaku made good on his promise in August to be better than Sergio Aguero.
“I think that showed the focus he had then; obviously he has got that drive, he wants to become the best in the world,” the Spanish coach explained.
“He wanted to improve in certain aspects of his play and he has done that. His back to play [with his back to goal] is a huge, huge improvement, the amount of goals, his work rate, he has been very influential.
“He has proven since that August conversation that he was very much focused and meaning what he was saying.”