Gonzalo Arroyo Moreno/Getty Images
The first of the crunch games comes against Atletico Madrid at the end of January.
The first of the crunch games comes at the end of January when Atletico Madrid are the visitors to the Camp Nou.
Diego Simeone's side are playing above themselves again this season, and even though players like Jackson Martinez haven't lived up to their expectations, others have more than made up for it.
Antoine Griezmann in particular wouldn't look out of place at Barca, and the Frenchman has carried his team-mates at times.
Of particular interest will be the battle between Uruguay captain Diego Godin and centre-forward Luis Suarez, a contest where no quarter will be asked nor given.
If the status quo has remained the same by the time of this game, then Atleti will know that a win for them would keep them clear at the summit even if Barca were to then win their game in hand.
Simeone doesn't normally need to motivate his players but that will give them added impetus to go for the jugular.
It won't be an easy task, however.
Barca have won the last five games between the sides, and this match takes place just five days before the 10-year anniversary of the last time the Rojiblancos won at the Camp Nou, per Fussball Wettpoint.