It was a relatively boring affair until a Gerard Moreno 93rd-minute winner stole all three points and a victory for Espanyol against Real Madrid on Tuesday night.
However, according to the former referee, there was a big mistake in the first half which arguably could have changed the course of the game for the Spanish giants.
Gareth Bale and some of his Madrid team-mates appealed for a penalty when the ball struck Sanchez's arm in the box as he slid in, which to Iturralde should have been given by the official.
"It's different being on the ground with your hand [there] to support you than to drag your hand to intercept the ball by occupying a space which makes yourself bigger. That is an unnatural position, which is why it was a punishable offense. It's a risk which players take", he explained in his column.
Regardless of whether it was or wasn't a penalty, 'Los Blancos' suffered another loss in La Liga and their deficit to rivals Barcelona could now be stretched back to 17 points if 'Los Cules' beat Las Palmas on Thursday.