His skills were evident from the start but Vinicius Junior has often struggled to turn great plays into goals.
The Brazil defender makes it nine players currently on the sidelines for Zinedine Zidane, who called up six youth teamers for Tuesday's 2-0 win over Getafe.
Humiliated in the cup by Segunda B's Alcoyano, a week after being outfought and largely outplayed in the Spanish Super Cup by Athletic Bilbao, Madrid find themselves in another slump.
A statement from Real on Friday confirmed the injury to the Brazilian without stating when he would return although Spanish newspaper Marca said he would be out of action for three weeks.
UEFA president Aleksander Ceferin lauds players like Raheem Sterling and Marcelo for taking political stance
UEFA president Aleksander Ceferin on Wednesday praised footballers for taking a political stance and said the European football governing body’s own attempts to tackle racism in the game were “not enough.”
LaLiga: Marcelo takes knee as Real Madrid make winning return to league; Atletico held to draw at Athletic Bilbao
Real Madrid resumed their Spanish league campaign with a 3-1 win over Eibar on Sunday to keep pace with leader Barcelona.
Casemiro's performance in the Clasico, to contain Lionel Messi, suggests the showing against Manchester City was only a blip for the remarkable player.
LaLiga: Barcelona, Real Madrid players advised to stay in same hotel due to Catalan protests ahead of Clasico
Authorities have promised the Barcelona-Real Madrid match will go ahead and Democratic Tsunami, which says 25,000 people will attend the protest, say they do not want to disrupt the match
LaLiga: Real Madrid forward Gareth Bale set to miss upcoming league Espanyol game, Champions League fixture against Club Brugge
Other Madrid players who did not practice with the rest of the squad on Friday included Eden Hazard, James Rodríguez, Marcelo, Marco Asensio and Lucas Vázquez
Real Madrid defender Marcelo said his side’s gutsy 2-1 win away to Alaves is the type of victory that could end up proving the difference in the title race after his side went three points clear at the top of La Liga on Saturday.
LaLiga: Real Madrid manager Zinedine Zidane unfazed by criticism aimed at him despite club's fluctuating form
Not for the first time this season, Zidane singled out Gareth Bale for praise on Sunday after the Welshman continued his reintegration at the club with another tenacious display.
Champions League: Real Madrid's Marcelo to miss Paris Saint-Germain clash after sustaining back injury
Marcelo is set to be replaced at left back by Ferland Mendy as the record 13-time winners Real Madrid make their European bow
LaLiga: Zinedine Zidane drops Gareth Bale from Real Madrid squad for second game running to increase doubts over his future
Gareth Bale will be excluded from Real Madrid's squad for the second match running as Zinedine Zidane continues to suggest the Welshman is not part of his plans for next season.
Ligue 1: Lyon's loss to struggling Dijon piles pressure on manager Bruno Genesio; AS Monaco inch towards safety
Lyon slipped to a second damaging defeat this week as a 3-1 loss to struggling Dijon and a hostile atmosphere at the Groupama Stadium piled the pressure on Bruno Genesio on Saturday.
LaLiga: Real Madrid manager Zinedine Zidane says outcasts Gareth Bale, Isco and Marcelo have future at club
Zinedine Zidane has offered a way back for Gareth Bale, Isco and Marcelo at Real Madrid as he prepares for his first game since being re-appointed as coach.
Ligue 1: Skipper Marcelo injured as Lyon stumble against Strasbourg as Champions League trip to Barcelona looms
Lyon's stand-in captain Marcelo left the field with a leg injury as his side struggled to a 2-2 draw at Strasbourg on Saturday, just days away from the Champions League last 16 second leg at Barcelona.
Champions League: Calls for Jose Mourinho's return as Real Madrid manager intensify after Ajax humbling
Jose Mourinho, who won a La Liga title with 100 points, is already being touted as the man best suited to the lead the transformation at Real Madrid.
European football talking points: Marcelo's nightmare season, Borussia Dortmund's perilous slide in Bundesliga and more
From Marcelo's struggles at Real Madrid to Borussia Dortmund's faltering campaign in the Bundesliga, here are top talking points from European Football
Copa del Rey: Sergio Ramos scores twice as Real Madrid come from behind to beat Girona in thrilling first leg
Sergio Ramos scored twice to put Real Madrid on the brink of the Copa del Rey semi-finals as they came from behind to beat Girona 4-2 in a thrilling first leg on Thursday.
Premier League: Jose Mourinho's sacking from Manchester United 'a shame', says Real Madrid's Marcelo
Jose Mourinho was dismissed by Manchester United after a poor run of form left the club sixth in the Premier League table and 19 points adrift of leaders Liverpool.