Lewandowski tricks in Barca win

Robert Lewandowski made history with his maiden hat-trick for Barcelona against Viktoria Plzen, becoming the first player to hit Champions League trebles for three different sides. The Poland international found the target twice in the first half at Camp Nou with Franck Kessie and Plzen's Jan Sykora also netting in a frantic opening 45 minutes.

Lewandowski capped a scintillating performance with his third after 67 minutes, firing a 20-yard finish past Jindrich Stanek after a neat interchange with Ferran Torres, who then struck to seal a 5-1 victory for Barca.

Sane stars for Bayern

Bayern Munich defeated Inter 2-0 at San Siro in their opener thanks to a first-half strike from Leroy Sane and Danilo D'Ambrosio's own goal. The visitors dominated the opening stages and deservedly went ahead through Sane when he brilliantly brought down a Joshua Kimmich long ball, before rounding Andre Onana and drilling home.

Julian Nagelsmann's side came under increasing Inter pressure in the second half, but D'Ambrosio's awkward attempt at a block from a Sane shot killed the game off and earned Bayern all three points.

Griezmann rescues Atleti

Antoine Griezmann stepped off the bench to guide Atletico Madrid to a remarkable 2-1 win over 10-man Porto, in a match that featured three stoppage-time goals.

After Mehdi Taremi picked up a second yellow card for simulation, Mario Hermoso fired Atleti ahead before handling in his own area, allowing Mateus Uribe to level the scores with a 96th-minute penalty. There was to be one final twist in the 11th minute of added time, however, as Griezmann reacted quickest from an Atleti corner to cap a remarkable contest with a dramatic winner.

Tottenham beat Marseille

Richarlison scored his first two Tottenham goals as they marked their return to the Champions League for the first time since the 2019-20 season with a 2-0 win over 10-man Marseille. Spurs started slowly in their first competitive clash against the Ligue 1 side, but their cause was helped significantly just after half-time when Chancel Mbemba was shown a straight red card for a professional foul.

Antonio Conte's men took full advantage of that numerical advantage inside the closing 15 minutes as Richarlison twice headed past Pau Lopez to the delight of the Tottenham Hotspur Stadium crowd.