Barcelona have survived a scare against Galatasaray in the Champions League while Bayern Munich were stunned by a late equaliser from Viking in a 3-3 draw in Norway.
Arsenal rolled over Lille and there was more misery for Manchester United.
Barcelona's 100 per cent start to the season was under threat down 1-0 to Galatasaray in Istanbul, but the Spanish champions rallied to a 4-1 win.
Bayern were in even more trouble against Viking, trailing 2-0 at halftime before Harry Kane turned the game around with two goals after the break. Luis Diaz looked to have completed the comeback, but a red card for Michael Olise and a 90th minute goal from Herman Haugen provided another twist.
Arsenal cruised to a 3-0 win at home over Lille and Atletico Madrid piled more pressure on United coach Michael Carrick with a 2-0 win at the Metropolitano.
Inter Milan fell to a surprise 4-3 home loss to Club Brugge, and Villarreal beat Napoli 3-1.
It's now 10 straight wins for Barcelona after they maintained their perfect record in all competitions despite early trouble in Turkey.
Aleksey Batrakov gave Galatasaray the lead before his team had a second goal ruled out for a tight offside. Joao Cancelo's goal leveled the score just before halftime and it was all Barcelona after that with goals from Fermin Lopez, Anthony Gordon and Karim Adeyemi.
A bizarre sending-off for Olise paved the way for Norwegian team Viking to rescue a draw in their first Champions League home game since 1992.
Shortly after Bayern went ahead 3-2, Olise picked up two yellow cards in quick succession - the second for tossing the ball at opponent Zlatko Tripic while the referee was still booking him for his first foul.
Tripic then provided the cross that allowed Haugen to head in the equaliser in the 90th minute.
Azerbaijani outsidersd Sabah claimed their first win in the league phase of the competition by beating Slavia Prague 2-0.
Second-half goals from Kaheem Parris and Joy-Lance Mickels secured the historic win in Baku. The club was only founded nine years ago.
Sporting Lisbon also sealed a 2-0 win at Lens through goals from Luis Suarez and Issa Doumbia.