The Champions League side were all set to take their case to the authorities yesterday but, according to Marca, they withdrew their complaint because they were not sure the evidence would provide a positive result, and the use of valuable resources would not guarantee his presence at the Mestalla.
The yellow card, which was picked up for a tackle on Fernando Gago, was the Spanish international's fifth of the season, and hence he will serve a suspension at the weekend.
Villarreal lost 1-0 in the end to Real Madrid, meaning that they dropped out of the top six, into seventh, and out of the European places.
They will be keen to jump straight back up at the weekend, but on Saturday night they face a tough test against Valencia, who outclassed Atlético Madrid last weekend.
The only good news for Villarreal is that they have the whole week off, owing to the fact they were knocked out of the Copa Del Rey last round.
James Walker-Roberts, Goal.com