FC BARCELONA: SHOULD BARÇA BE CONCERNED WITH MESSI SLUMP?

Should FC BARCELONA fans be concerned about LIONEL MESSI?This question has been raised because there is a clear lack of freshness with the player which has manifested itself in his performances in the last few games. This same observation has been on Barça Coach Guardiola´s mind & now he is meditating putting the current FIFA World Player & Golden Ball winner on the bench. Is this wise or will