The Belgium international has blossomed in his second season at Stamford Bridge, registering 15 goals in all competitions for the Blues - 14 of which have come in the Premier League.
"Eto'o tells me every day that I can be one of world's best players," he told La Derniere Heure. "Before every game he tells me I have to make the difference.
"He tells me, 'You don't leave the stadium without scoring a goal.' After a while you understand that.
"A few years ago, football was just football for me. If I didn't score, I didn't care too much, as long as we won the game. Now I want to score in every game and be decisive."