Yamal scored early and Raphinha added a brace in Barca's 0-3 win. Cunha scored a double in Manchester United's comeback over Roma. PSG beat Villarreal 0-6, Bayern won 0-2 at Atletico.

The fourth matchday of the UEFA Champions League opened on Tuesday night with high-octane drama across the continent. FC Barcelona cruise control stayed firm in a 3–0 thrashing of Aston Villa powered by a Raphinha brace - a match that saw Israeli talent Orian Goren left as an unused substitute once again. Meanwhile, Manchester United produced a stunning 3–2 turnaround against Roma at Old Trafford behind a dramatic Matheus Cunha double before the Brazilian hero was sent off in stoppage time, potentially saving manager Michael Carrick’s job.

Elsewhere, European champions Paris Saint-Germain delivered the night's absolute masterclass, shellacking Villarreal 6–0 with four goals inside the opening 17 minutes. Bayern Munich secured a composed 2–0 away victory at Atletico Madrid, and Inter Milan comfortably handled Feyenoord 3–0 in Rotterdam.

Barcelona notched their 11th victory in their last 13 Champions League fixtures in a match where 17-year-old Orian Goren once again remained on Hansi Flick's bench - as he did in El Clasico against Real Madrid - still awaiting his senior debut.

Fresh off a 6–1 domestic win over Alavés, the Catalans handed Villa their first defeat of the European campaign following three straight wins. Barca also recorded their first European clean sheet after 18 consecutive matches conceding, extending their home unbeaten record against English clubs to 16 games. Raphinha continued his scintillating form by bringing his tally to 19 goals in all competitions, following Lamine Yamal's early opener capitalized on a defensive blunder from the visitors.

The European champions put on a clinic in Spain, tearing through the hosts to net a historic four goals inside 16 minutes and two seconds. Despite missing Ousmane Dembele, Khvicha Kvaratskhelia, and Marquinhos, PSG - who entered riding a nine-match winning streak and 14 goals through three European matchdays - walked through Villarreal. Fabian Ruiz bagged a double alongside strikes from four other players, including 17-year-old full-back David Boly on his tournament debut. The victory marked PSG's 10th straight win across all competitions and extended their unbeaten Champions League run to 14 matches.

An impressive nine-game unbeaten streak, eight wins, and a 20-match home scoring run in Europe were not enough for Atletico Madrid against Bayern Munich. Following a scoreless opening half, young Lennart Karl broke the deadlock in the 54th minute, pressing Robin Le Normand and capitalizing on a failed clearance to beat Jan Oblak. Twenty minutes later, Konrad Laimer provided the highlight of the night, latching onto a Harry Kane pass to smash a rocket off the crossbar from a tight angle. The Bavarians got back to winning ways in the tournament following back-to-back draws.

Michael Carrick could hardly have scripted a more dramatic night at Old Trafford. Manchester United entered on a grim nine-game winless streak and found themselves trailing 2–0 inside 18 minutes courtesy of goals from Matias Soule and Donyell Malen. Bruno Fernandes pulled one back from a retaken penalty in the 58th minute after VAR ordered a re-kick due to Roma encroachment. A minute later, Bryan Mbeumo hit both posts on a single play, squandering a golden chance to level.

The late chaos belonged entirely to Matheus Cunha. The Brazilian pounced on a Balerdi mistake to equalize in the 83rd minute before smashing home the winner three minutes later from a narrow angle. Cunha then turned villain in stoppage time: Having already been booked for removing his shirt during the goal celebration, he launched into a reckless tackle on Balerdi in the 91st minute to draw a second yellow. United held on with ten men to snap their dry spell and likely save Carrick’s post.

Inter Milan bounced back from their derby defeat against AC Milan with a decisive away victory in Rotterdam. Yann Bisseck opened the scoring in the 8th minute with a fine turn and strike into the far corner. Francesco Pio Esposito doubled the advantage in the 34th minute with a close-range header off a Spence cross, before Piotr Zielinski wrapped up the points in the 54th minute with a crisp strike from range. Cristian Chivu’s side moved to six points in the group phase while extending their unbeaten record against Dutch opponents in the Champions League to 14 matches.