However , Guardiola 's side relied upon him too much at times .
That , of course , was hardly his fault : Messi missed a penalty in the Champions League semi-final second leg against Chelsea but was a peerless performer for the Catalan club .
Guardiola 's side relied upon him too much at times .
That , of course , was hardly his fault : Messi missed a penalty in the Champions League semi-final second leg against Chelsea but was a peerless performer for the Catalan club .