Barcelona midfielder Sergi Roberto admits their recent form hasn't been good enough.
Barca coach Koeman is under pressure after drawing with Granada and Cadiz this week.
After the stalemate at Cadiz, Roberto said: "Here we have to win LaLiga, it is not enough for me to just enter the top 4.
"We have to fight for the title, there is a very good squad even if they are injured. There is a squad to fight in the league."
He added: "You have to give one hundred percent and I am doing that. Better times will come, you have to be more united than ever. Move forward. We are on a not very good streak. But I am happy."
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