Carlo Ancelotti's side can now win La Liga as soon as this weekend, thanks to Real Madrid's triumph over Sevilla last night — practically a six-point swing at the top of the league — and Barcelona's unexpected home loss to Cadiz today.
To be sure, it'd have to be an unlikely circumstance, but it's plausible. Real Madrid may be champions by Sunday if they beat Osasuna on Wednesday at home. Barcelona would need to win just one point in their next two games (Real Sociedad on Thursday; Rayo Vallecano on Sunday), while Atletico Madrid would need to draw or lose against Granada on Wednesday.
Of course, that's a big ask, but the fact that we're discussing it demonstrates that, even if it doesn't happen this weekend, Real Madrid will win La Liga.