Pepe is a fantastic player, a real stalwart of a defender who also has a menacing presence in the opposition box. Despite all of his qualities, his temper is more than unstable and occasionally, he loses it in big games - think back to Barcelona in 2011, or the Getafe game where he received a whopping ten-match ban. When Real are struggling and inviting pressure, Pepes temperament comes in to question. Man Utd will undoubtedly enjoy spells of dominance in the tie, such is their style of football of late. When United begin a decent spell of being on top, Pepe may well take matters in to his own hands, leading to a moment of madness. it's important to remember that he also has a small history with Wayne Rooney from his Porto days, and Wazza is not a player one would like to anger too much.