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.

Real Madrid coach Carlo Ancelotti said Monday his team's "many styles" of play have helped them go 38 La Liga matches without defeat.

Real Madrid manager Carlo Ancelotti on Friday brushed aside criticism of his side's unattractive style, saying winning was more important than playing well.

"It may have looked pretty easy, but it's really not," Alonso told reporters after his team cruised to four first-half goals to break the Dutch resistance.

"It's amazing, to get a last-minute goal like this is always fantastic and it's good to give the fans something to cheer about," Atletico's former Leipzig striker Alexander Sorloth told DAZN.

Spaniard Raya dived low to his right to beat out Mateo Retegui's spot kick in the 51st minute then sprang across his goal to claw away the forward's follow up header.

Hansi Flick's side have started the season with a perfect record after five La Liga matches but struggled to find their best level against the Ligue 1 side.

PSG had over 60 percent possession and 24 attempts on goal but looked set to be left frustrated by their opponents at the Parc des Princes until a low Nuno Mendes cross squirmed under Gazzaniga and into the net in the 90th minute.

Approaching a decade since Barcelona last won the Champions League, the Catalan giants face Monaco in this season's European opener on Thursday aiming to make a statement.

Last year's finalists, who lost to Real Madrid at Wembley in June, got off to a fast start in the new-look league stage.

Henrikh Mkhitaryan blazed over the best chance of the match 15 minutes from time.

Bologna's fans relished the milestone occasion as they returned to Europe's elite club competition for the first time in almost 60 years.

Villa boss Unai Emery had urged his team to take three points in Bern as a tribute to the club's former striker Gary Shaw, who died on Monday aged 63 after being injured in a fall.

"He is able to do things that no-one can think of," Ancelotti said after the 18-year-old Endrick became the youngest Real Madrid player to score in any official international competition.

Kylian Mbappe scored on his first Champions League appearance for Real Madrid as the holders started their trophy defence with a 3-1 win over Stuttgart on Tuesday.

UEFA, the European game's governing body, sensed the need for change at a time when the traditional group stage was becoming more predictable and the continent's biggest clubs were threatening to break away and form their own Super League.

"Something big is coming," Neuer told reporters ahead of Tuesday's opening clash with Dinamo Zagreb at home.

"Sometimes nobody asks the players what they think about adding more games," Alisson told reporters.

Midfielders Jude Bellingham, Aurelien Tchouameni and defender Eder Militao are set to be available for the match at the Santiago Bernabeu despite Militao missing training as he required an extra day to recover fully.