Carlo Ancelotti said Real Madrid were "still on holiday" in their shock 1-0 loss to Getafe on Sunday while Barcelona overcame their Covid chaos to sneak a tight victory away at Mallorca.
Spanish international Ferran Torres signed for cash-strapped Barcelona on Tuesday from Manchester City, the Catalan side announced.
Barcelona have agreed a fee worth an initial 55 million euros ($62 million, £47 million) for Manchester City forward Ferran Torres, according to reports in Spain and England on Wednesday.
Manchester United could receive January offers from Barcelona for two of their out-of-favour players, according to reports.
Manchester United striker Edinson Cavani has reportedly agreed to join Barcelona next month.
Argentine and Barcelona forward Sergio Aguero has announced his retirement from football at the age of 33.
Barcelona forward Sergio Aguero will make an announcement on his future on Wednesday following cardiac and respiratory difficulties suffered while playing in La Liga in October.
Barcelona will face Napoli in the Europa League knockout round play-off stage after the Catalan giants crashed out in the Champions League group stage for the first time since the 2000-01 season.
Barcelona coach Xavi Hernandez on Tuesday called on his side to "make history" this week by handing Bayern Munich their first home defeat in the Champions League's group stages since 2013.
Manchester United interim manager Ralf Rangnick is wasting no time reshaping his team - and wants Barcelona star Frenkie De Jong to anchor his midfield.