Teenager Lamine Yamal scored the only goal of the game to give FC Barcelona a narrow 1-0 win at home to Mallorca to keep their slim hopes of this season's title alive.
Real Sociedad became the first team to qualify for the semifinals of the Copa del Rey with a 2-1 win away to Celta Vigo, who rested a host of key players and paid the price.
Real Sociedad will be without left-back Aihen Munoz for the rest of the season after the club confirmed he suffered a torn cruciate ligament in its 1-0 win away to Celta Vigo on Saturday night.
FC Barcelona had to withstand a second half fightback at home to Celta Vigo to cling on for a narrow 1-0 win in the Camp Nou on Sunday in the eighth round match of La Liga.