Iniesta: No-one at Barcelona taking Liga title for granted
Barca are runaway leaders ahead of the resumption to the second-half of the season.
"If we start believing that we can't lose, then it will surely happen. From January until the end we are going to have to treat every game like a final, because we are in an unimaginable position for this stage of the season.
"We can't let it go, but there's a long way to go and we shouldn't get too confident," said Iniesta.