Lionel Messi scores 30th and 31st league goals of the season for Barcelona . Mata then set up David Silva for Valencia 's third . 2 - 0 win over Valencia boosts Barca 's chances of retaining La Liga title . Real Madrid must win at Real Madrid on Wednesday night to keep their hopes alive .
Lionel Messi scores 30th and 31st league goals of the season for Barcelona . 2 - 0 win over Valencia boosts Barca 's chances of retaining La Liga title . Real Madrid must win at Real Madrid on Wednesday night to keep their hopes alive .