The Spaniard now faces a spell on the sidelines after tweaking his hamstring in Sunday's win against QPR.
Boss Brendan Rodgers said: "He will probably be out for up to six weeks.
"It's a shame because in the game he felt nothing. Sometimes you can enter games and be tight and stiff but he felt great.
"It was unfortunate he has done that because he has looked fantastic in the recent games."