Barcelona players dedicated Saturday's win over Sevilla to teammate Eric Abidal.
Abidal is to undergo a liver transplant and players from both teams wore t-shirts in support of him before the game.
The Catalans won the match 2-0 thanks to goals from Xavi and Lionel Messi.
"However, with the strength and confidence that Abidal has, I'm sure that he'll come out of this one."
Abidal had liver surgery a year ago after being diagnosed with a tumour, but returned to the team just seven weeks later.
Defender Gerard Pique said: "We have to be by Abidal's side and give him our love.
"We had to forget about what happened off the pitch and start the game focused. The fact that we don't have Abidal is difficult. We'll try to be with him but on the pitch we have to do our jobs well.
Midfielder Cesc Fabregas added: "As a player and a person he's very committed, sincere and honest. It's a shame, but we're with him 100 per cent.""This victory is for Abidal," goalkeeper Victor Valdes said on the club's official website. "These are difficult times that we must overcome.