It's not as if Ronaldo went over to the Barcelona bench and attacked their coach. The incident came about when a ball went into touch and was picked up by Guardiola. When Ronaldo came to take the ball for the throw-in, Guardiola held the ball away from the player with this right hand. After Ronaldo spend a moment reaching for the ball, Guardiola flicked the ball away, along the sideline. As Ronaldo turned toward the ball, right outstretched right hand gave Guardiola a small shove.
The Barcelona players immediately reacted. Andrés Iniesta came over from midfield to shoved Ronaldo. From there, each player converted on the tussle, with Real Madrid defender Pepe sprinting into the fray from 50 yards away. Pepe, who was once suspended for 10 Liga matches for violent conduct, surprisingly played a peace keeper's role, talking to goalkeeper Victor Valdes when the Barça player looked ready to escalate the confrontation.
Cooler heads prevailed, as they say, with only one yellow card show. Congratulations, Victor Valdes, on winning the caution. see the highlights here [HQ]