Barcelona were worthy winners of the latest edition of el Clasico with a thumping 5-0 victory over Jose Mourinho's Real Madrid at Camp Nou.Xavi opened the scoring on 10 minutes after a defensive mistake by the away side. Pedro added a second eight minutes later with a close-range finish. Barcelona continued to control the game and made it three on 55 minutes with an expert David Villa finish who added another three minutes later.The cherry was placed in the cake in the 91st minute when substitute Jeffren bundled in a fifth. To add to their misery, Real Madrid were reduced to ten-men in the 93rd minute when Sergio Ramos received his marching orders.Pep Guardiola's men return to the top of La Liga after inflicting the first defeat of the season on Real Madrid who will have to show plenty of mental strength to bounce back from this demoralising defeat.The first chance fell to Barcelona on six minutes when Lionel Messi nearly produced a moment of magic worthy of gracing any game. The diminutive superstar nonchalantly curled a left-footed effort towards the top corner from the tightest of angles but could only watch on as the ball rebounded off the post and to safety.The home side continued to press the visitors and got their just rewards on 10 minutes through a slice of luck. Andres Iniesta's wonderful through-ball was nearly intercepted by Marcelo. However the Brazilian left-back could only knock the ball into the path of Xavi who after some unconventional control, poked the ball past Iker Casillas from six yards out.Real Madrid came close to levelling matters two minutes later. Mesut Oezil played in Angel di Maria on the edge of the Barcelona box and the Argentine unleashed a powerful effort that was acrobatically tipped over the bar by Victor Valdes.On 14 minutes the away team came close again when Cristiano Ronaldo's clever ball found its way into the Barcelona box and Eric Abidal narrowly avoiding putting the ball past his own 'keeper under pressure from Karim Benzema.However, the home side looked sharp and went two up after 18 minutes through some excellent work by David Villa. The Spanish striker received a precise pass from Xavi on the left before jinking past Sergio Ramos and firing a low cross into los Blancos' six-yard box which Casillas failed to deal with leaving Pedro with a simple task of knocking the ball in.The Blaugrana were threatening to run riot in the most anticipated game of the season and came close to making it three on 28 minutes. Xavi pinged a wonderful defence-splitting pass towards Pedro yet the goalscorer was beaten to the ball just inside the box by an alert Casillas.Jose Mourinho's men were in desperate need of a goal and nearly scored on 35 minutes. Ronaldo's trademark free-kick looped over the wall and flew narrowly wide from 25 yards with Valdes at full-stretch. Four minutes later Real Madrid had a decent claim for a penalty when Valdes appeared to make contact with Ronaldo who was running away from the goal. A case of the Portuguese schemer's reputation preceding him.