Real Madrid cannot afford to be complacent despite Barcelona's early season struggles, defender Dani Carvajal says.

Barca are ninth in LaLiga heading into the November international break, already 11 points behind leaders Real Sociedad and 10 shy of second-placed Madrid.

The Blaugrana are winless in four as a miserable season, which began with Lionel Messi leaving for Paris Saint-Germain, continues at Camp Nou.

Club great Xavi will take charge when the campaign resumes, with Sergi Barjuan having overseen two league matches since Ronald Koeman was sacked.

Xavi, who won 25 major honours in his Barca playing career, said as he was presented this week: "We have to work hard to get back to winning trophies."

Most commentators expect, at least in the league, silverware will have to wait until next season, but Madrid stalwart Carvajal is not ruling Barca out.

"Far from it," he told Marca. "We respect all rivals. We are surprised to see Barca so far behind, but no one can rule them out for any title.

"Respect is essential. Teams have better and worse moments, but everything comes out."

Indeed, Carvajal expects a big impact from Xavi, saying: "It is a safe change. The arrival of a figure like Xavi for Barcelona will fill them with enthusiasm.

"Although he is a rival, I wish him all the luck in the world – not against us – because he is a colleague."

Dani Carvajal has signed a new four-year contract at Real Madrid which will keep him at the Santiago Bernabeu until 2025.

Right-back Carvajal joins midfielder Luka Modric and versatile defender Nacho in agreeing fresh terms with the club ahead of the 2021-22 season.

Carvajal came through the youth ranks but was sold to Bundesliga side Bayer Leverkusen in July 2012 having not managed to make a single first-team appearance.

However, Madrid exercised a buy-back option on Carvajal the following year and he has since gone on to become a regular, helping the club secure plenty of silverware. He has won LaLiga twice with Madrid, as well as the Champions League on four occasions.

However, Carvajal struggled with injury problems last season, making just 13 appearances in LaLiga as Zinedine Zidane's squad were unable to defend their league crown.

A hamstring injury ruled him out of contention for Spain's squad for Euro 2020 but he has begun training with his Madrid team-mates under the watch of new head coach Carlo Ancelotti ahead of the upcoming campaign.

Zinedine Zidane and Toni Kroos have lamented Real Madrid's growing injury issues after full-back Dani Carvajal limped off in Sunday's 2-0 win over Valencia.

Carvajal was making his first appearance for Madrid since January 2 but lasted just 28 minutes before sustaining an apparent injury to his right thigh.

He has been restricted to 12 games in all competitions this term and is now considered a big doubt for the Champions League last-16 first leg with Atalanta on February 24.

The Spain international joins the likes of Sergio Ramos, Eder Militao, Alvaro Odriozola, Eden Hazard, Rodrygo, Federico Valverde and Marcelo on the sidelines.

Madrid boss Zidane is concerned about the long list of injuries he has had to contend with this term and is unsure why so many players have been ruled out of action.

"There are a lot of injuries," he told Movistar. "I'm worried because when you lose a player it bothers me. It's a relapse [for Carvajal]. 

"I'm sorry for him because he was fine to play and is a very important player to us. But I can't explain all these injuries."

Asked if the packed fixture schedule is to blame, with Madrid playing nine times since the turn of the year, Zidane said: "I'm not going to get into that.

"We already have enough trouble. The calendar is what it is. We didn't have a normal pre-season and there are many injuries. 

"I hope to get my players back but I'm not going to get involved in the rest."

Lucas Vazquez replaced Carvajal at right-back and slotted in seamlessly by teeing up Kroos for Madrid's second, 30 minutes after Karim Benzema had opened the scoring.

Kroos, who scored and assisted a goal in the same Madrid match for the first time since November 2018, joined Zidane in bemoaning his side's injury nightmare.

"It worries us a lot, of course. We are without important players," he said. "Dani has come back from three injuries in a row - it's not right, we don't like it.

"But the others have to do as much as possible. We can't change the situation, just accept it."

Valencia managed just one attempt on target at Estadio Alfredo Di Stefano - Maxi Gomez's shot from range - in what was a routine third successive league win for Madrid.

Zidane's men have now kept back-to-back clean sheets and the Frenchman is pleased with the improvement made by his side at the back.

"That much is evident," he said. "We believe a lot in what we do. We are overcoming difficulties and there is a lot left for us to give."

Madrid, who have now gone 13 home LaLiga matches without losing to Valencia, are five points adrift of Atletico Madrid having played two games more than the league leaders.

But two-time title-winning boss Zidane is not yet giving up hope of chasing down rivals Atletico, who Madrid face at Wanda Metropolitano on March 7.

"We are going to continue doing what we are doing," he said. "We are not going to look at what others are doing. Today we played a very good game. 

"They all defended very well without the ball and when got forward we caused a lot of damage. We have to continue in this way."

Valencia head coach Javi Gracia has won only one of his eight LaLiga games against Madrid and took full blame for his side's lacklustre display in the Spanish capital.

"It was a bad game from us," he said. "I do not know if it was our worst of the season but one of the worst. The intention was to be more aggressive, it was very easy for them.

"The coach has the maximum responsibility in everything. This is a step backwards in our trajectory. From the first minute we have not been able to demonstrate anything. 

"We have not seen options to achieve anything positive here. We could not even link two passes"

Zinedine Zidane is in "good spirits" after testing positive for COVID-19 as Real Madrid get ready to take on Deportivo Alaves without their head coach.

The Spanish club confirmed on Friday that Zidane is isolating after contracting coronavirus, meaning he will not be present for Saturday's LaLiga fixture.

Having already lost to Athletic Bilbao in the semi-finals of the Supercopa de Espana, Los Blancos suffered a humiliating defeat to third-tier club Alcoyano to exit the Copa del Rey in midweek.

With their title defence also stuttering, the pressure has increased on Zidane, whose absence this weekend means assistant coach David Bettoni will be in charge.

"I spoke to him this morning, he's feeling fine," Bettoni told the media ahead of a trip to an Alaves side that won 2-1 in Madrid last season.

"He's in good spirits. He won't be with us in person but we know he'll be supporting us. The important thing is that everyone knows he'll be there in spirit.

"We're just finalising how we're going to do things."

Zidane insisted he remained calm about his own future in the aftermath of the defeat to Alcoyano, having seen a strong Madrid side let slip a 1-0 lead to lose 2-1 after extra time.

Bettoni insists the squad remain united with the focus now shifting back to LaLiga, where they quickly need to make up ground on leaders Atletico Madrid.

"At Real Madrid, every defeat brings criticism, but we have enough experience to know we've got a chance against Alaves to show everyone we're a unit," he said.

"We're all together in this and we're going to do all we can to take the three points. We work hard every day towards just that and we have another chance to show it."

Sergio Ramos did not feature in the cup tie on Wednesday and will once again be absent this weekend, while fellow defender Dani Carvajal is not yet ready to make a return.

"With Sergio Ramos, he is in his recovery process and he won't be with us tomorrow," Bettoni confirmed.

"Dani Carvajal trained a little with us, but he won't be with us either and will be able to train normally from Monday."

Madrid have lost just one of their previous 15 away games in LaLiga but have found goals hard to come by this season, managing 30 in 18 games. That is their second-worst tally at this stage in the past 14 campaigns.