Gerard Pique refused to throw in the towel on the La Liga title after Barcelona's hopes of finishing top were damaged by Saturday's goalless draw against Atletico.
Barca remain two points behind Atletico with three games to go, while Real Madrid can move two points ahead of them, too, if they beat Sevilla on Sunday.
"We hoped to win this one but we're still alive," Pique told Movistar. "We had more chances, we competed. We're still in contention seeing how this season's gone, I think we still have a chance.
"Anything can happen, as we have seen in La Liga. Madrid will win the league if they win four games, but the big teams are struggling to find consistency. The points totals are low and without fans in the stadiums everything is more even.
"I think if we win three games, we're going to have a chance. That's the idea now, to win out from here and compete until the end. It's a shame because in recent months we've done well."
To win the league, Barça now need both Atletico and Madrid to either lose one of their remaining games or draw two, due to the fact both Madrid sides have the better head-to-head record against the Catalans.