(CNN) -- Cristiano Ronaldo's stunning extra-time header gave Jose Mourinho his first trophy as Real Madrid coach on Wednesday, winning the Spanish Cup final 1-0 against arch-rivals Barcelona.

Real went to Valencia seeking a first Copa del Rey triumph since 1993, and the 42nd goal this season by the world's most expensive player handed the club an 18th success in the competition.

The Portugal captain rose high at the far post to power in a 103rd-minute effort from a teasing cross by Angel Di Maria, who was sent off for a second booking at the end of the second spell of extra time.

It was Ronaldo's second goal in two games against Barca, having netted a late equalizing penalty in Saturday's 1-1 draw that left the Catalans eight points clear in La Liga.

cristiano ronaldo won his first cup in the Real Madrid after scoring a goal of head he won the Copa del Rey Casillas was the player of the game he save a lot of balls and then Cristiano score a goal.