Real Madrid know their title chances are all but over if they fail to beat rivals Barcelona in the final Clasico of 2017.
The reigning champions sit 11 points behind table-toppers Barca, though have a game in hand, and a third defeat of the campaign would create a near-impossible gap to bridge.
The last time a Clasico was held on Christmas Eve Eve, Real ran out 1-0 winners at Camp Nou thanks to a Julio Baptista goal exactly a decade ago.
Cristiano Ronaldo appears to have found his scoring touch this season, netting in each of his previous four games, so can he inspire Real to a much-needed Clasico win?
Real Madrid Boss Zinedine Zidane has a fully fit squad to pick from for the crunch championship Clasico clash.
Gareth Bale may have played his way into contention after impressing in the World Club Cup, with Isco the likely to make way if so.
It is less good news for Barcelona.
The squad returned to training on Wednesday morning, with Jordi Alba and Arda Turan working out separately from the group.
Real Madrid likely starting XI:
Navas; Carvajal, Varane, Ramos, Marcelo; Casemiro, Kroos, Modric; Isco; Benzema, Ronaldo
Barcelona starting XI:
Ter Stegen; Roberto, Pique, Vermaelen, Alba; Rakitic, Iniesta, Busquets; Paulinho; Messi, Suarez