(deletes incorrect goal tally for Messi in para 15) * Barca let slip two-goal lead to lose 3-2 * Defender Pique sent off after 56 minutes * Fifth-placed Malaga held at home by Celta MADRID, Jan 19 (Reuters) - Leaders Barcelona suffered their first defeat in La Liga this season when Real Sociedad stormed back from two-goals down and made the most of a red card for Gerard Pique to record a 3-2 home win on Saturday. ... More...