HAS DIEGO COSTA FORGOTTEN HOW TO SCORE GOALS?

The big question many are asking is has Diego Costa the Spanish striker at Chelsea forgotten how to core goals now? But last year Diego Costa scored over 20 twenty goals and last year along with Eden Hazard and Cesc Fabregas made Chelsea the E.P.L winners. But very sadly this year all are a shadow of themselves , Diego Costa has scored just three goals in fifteen games. But what is diego Costa big problem here ? And honestly he is the main problem this year he is spending to much time fighting with other players leading to yellow and red cards as well. And the opposite team players join in the fight , he then completely gets involved in fighting and sadly Diego costa looses his concentration and the whole purpose of scoring goals and winning. He must correct himself fast or he will be sold to a club in Spain soon.