Suarez to the fore in Barca comeback
Luis Suarez inspired a spectacular Barcelona comeback which saw them return from two goals down to beat Real Sociedad 4-2 at Anoeta.
Willian Jose sent the hosts ahead in the 11th minute and Juanmi added a second goal in the 34th at a ground where Barcelona had not won in La Liga since 2007.
However, Suarez set up Paulinho to pull one back before half-time before scoring twice himself, to ensure Barcelona would remain unbeaten and nine points clear of second-place Atletico Madrid at the top of the table at the halfway stage of the season.
Lionel Messi added some gloss with a perfectly placed free-kick for Barcelona's fourth goal in the 85th minute, to end a thrilling game in spectacular fashion.
Real Madrid midfielder Toni Kroos said the Spanish champions cannot defend their title and are fighting to finish in La Liga's top four after their defeat to Villarreal on Saturday.
Madrid are fourth in the table after their 1-0 home defeat, 19 points behind leaders and bitter rivals Barcelona.
Zinedine Zidane's side have struggled this season and have won one game in their last five in all competitions, against third division Numancia in the King's Cup.
"We have to focus on qualifying for next season's Champions League," Kroos said. "I think this should be our goal for the rest of the season.
"It's not the moment to think about anything that is not the next game and returning to winning points to bring us close to Real Madrid's objective, which is to finish in the top four."