It is debatable but many Chelsea fans feel that if they had had a proven goalscorer last season instead of the ageing Eto and elusive Torres then they may have been in with a chance of winning the league.
With the arrival of Diego Costa Chelsea have again bet big. Mindful that his employers, the reigning La Liga Champions Atletico Madrid were unwilling to sell Chelsea were forced to meet Costa’s £32m buyout clause.
At 6ft 2in Costa is a powerful unit and perhaps Jose is hoping to return to days when Didier Drogba battered defences to submission.
Well the juries out for now, only time will tell.
So while you waiting for the EPL to start why not see how much you know about Diego Costa in our quiz.