The Brazilian had been sidelined since suffering a hamstring injury in a 1-0 victory for the Premier League and Champions League leaders at Crystal Palace on October 5.
Barcelona's young team can learn from the setbacks they have faced in their LaLiga campaign and continue to improve, manager Hansi Flick said on Tuesday ahead of their Champions League meeting with Borussia Dortmund.
"We have to survive the season, every game, try to take points, to try to win games and go forward," said Man City coach Pep Guardiola.
Real Madrid have endured a series of injuries this season, with several key players missing significant time, including Dani Carvajal and Eder Militao who are out for the rest of the campaign with ACL tears.
The Premier League leaders are top of the European standings with a 100 percent record and on Tuesday face a Girona side down in 30th, with four defeats in five matches.
Off the back of a fabulous campaign in which they won record-extending titles in LaLiga and the Champions League, Real have struggle in their European title defence, losing three of their last four continental matches.
Six players from Champions League winners Real Madrid and four from Manchester City feature in this year’s FIFPRO World 11 announced on Monday by the global players' association, with Lionel Messi absent for the first time in almost 20 years.
Jude Bellingham said Real Madrid were beaten by "the best-performing team in Europe" as Liverpool's dismantling of the Spanish giants set a new bar in Arne Slot's stunning start at Anfield.
Striker Kylian Mbappe had another subdued and disappointing performance for Real Madrid on Wednesday, failing to seriously trouble Liverpool's defence and missing a penalty in their 2-0 Champions League defeat at Anfield.
Karim Adeyemi scored three goals in the first half as Borussia Dortmund handed Celtic a brutal Champions League reality check, winning 7-1 at home on Tuesday.
Robert Lewandowski struck twice for Barcelona as they demolished Young Boys 5-0 in a one-sided Champions League clash on Tuesday.
Manchester City cruised to their first win in the Champions League this season with Erling Haaland among the goalscorers in a 4-0 thrashing of Slovan Bratislava that did little justice to the visitors' dominance.
Kai Havertz and Bukayo Saka inspired Arsenal's 2-0 success against Paris Saint-Germain on Tuesday as the Gunners secured their first win in the Champions League this season.
Flick is hopeful midfielder Frenkie de Jong can return as Barca look to bounce back after suffering two losses in 10 days, against Monaco in the Champions League and Osasuna in La Liga.
"It's one of those games when you have to play smart. With the ball, without the ball, you have to be patient, you have to be ready, you have to be focused," Alonso told reporters before Tuesday's game with Milan.
Real Madrid named Kylian Mbappe in their squad to face Lille in the Champions League on Wednesday after he missed one match with a thigh injury.
Barcelona's next away game is at Serbian club Crvena Zvezda in Belgrade on November 6.
Real Madrid forward Kylian Mbappe has suffered a muscle injury, the LaLiga club said on Wednesday, casting doubt over the French international's participation in the weekend derby against Atletico Madrid.
Barcelona coach Hansi Flick backed reserve goalkeeper Inaki Pena to replace stricken team-mate Marc-Andre ter Stegen on Tuesday, but also said the club must discuss if they will sign a replacement.
