Athletic Bilbao midfielder Ander Iturraspe has admitted that his side could not deal with Cristiano Ronaldo in Sunday's 5-0 defeat to Real Madrid.

Ronaldo bagged a hat-trick in the La Liga contest to take his tally to 13 goals in just six league games this season.

"Cristiano Ronaldo is a player on another level, on another planet," Iturraspe told Goal.com.

Since joining Los Blancos from Manchester United in 2009, the Portuguese has scored 269 goals in 257 appearances.

This season, the attacker already has 17 goals in 11 appearances, including two in the Champions League.