Real Madrid fullback Marcelo is convinced Barcelona will stumble before the end of the season.
Real must still host Barca as they chase down the Liga leaders and Marcelo said: "The match between Real Madrid and Barcelona is surely very important. But we cannot think only of that game. There are other teams that must be faced.
"We must continue to fight and win the three points.
"Barcelona has to suffer a downturn. We are very calm, working and doing our thing, which is to win and to see if Barcelona lose."