Pekerman's Blunder

I'm not a football pundit,but watching yesterday's game I could not help but feel Argentina's exit was of their own making.Their coach was the biggest culprit,starting with a formation that was negative at best.The tactics Jose Pekerman used didnot suit Argentina's style of play.A dour first half was the consequential result.Supposedly the best coach in the world,Pekerman also made the mistake of substituting Hernan Crespo with Julio Cruz when the Argentines were ahead.Hernan was the Argentines most potent threat,and though he had been having a bad game,it would've made more sense to keep the third substitution for later,just in case Argentina needed it.As a result of Pekerman's mistake,the brilliant Lionel Messi was reduced to a mere spectator,unable to come on since Argentina had already used their three substitutes!
Argentina might not be going home had Pekerman lived up to his reputation.