Barcelona, thanks largely to a hat-trick from Lionel Messi, and Atlético Madrid made it nine points out of nine as Mesut Özil registered a treble of his own in a 6-0 victory for Arsenal.
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- Lionel Messi scores a hat-trick as Barcelona maintain their 100% record, beating Manchester City
- Atlético Madrid also make it three wins from three after overcoming Rostov
- Arsenal and Paris have a six-point cushion in Group A after defeating Ludogorets and Basel respectively
- Mesut Özil on target three times in the second half in Arsenal's 6-0 triumph
- Beşiktaş end Napoli's perfect start to the UEFA Champions League group stage
- Return fixtures on 1 November
Arsenal 6-0 Ludogorets Razgrad
Mesut Özil scored a second-half hat-trick as Arsenal blew Ludogorets away. The German international took centre stage after Alexis Sánchez, with a deft chip, Theo Walcott and Alex Oxlade-Chamberlain had given the north Londoners a 3-0 advantage by the 46-minute mark.
Paris Saint-Germain 3-0 Basel
Ángel Di María, Lucas and Edinson Cavani, with a late spot kick, gave the scoreline a somewhat flattering appearance on a night when Basel hit the woodwork three times.
Napoli 2-3 Beşiktaş
Beşiktaş registered their first success in 12 all-time encounters with Italian opposition thanks to Vincent Aboubakar's winner, his second goal of the match, four minutes from time. Fabri saved Lorenzo Insigne's penalty for the Serie A side with the score at 2-1 but was eventually beaten from the spot by Manolo Gabbiadini.
Dynamo Kyiv 0-2 Benfica
Franco Cervi's strike added to Eduardo Salvio's early spot kick, awarded after Antunes brought down Gonçalo Guedes, as Benfica recorded their first victory in the section.
Celtic 0-2 Borussia Mönchengladbach
Lars Stindl's drive through the legs of goalkeeper Craig Gordon, following an unsuccessful attempt by Kolo Touré to shepherd the ball out of play, gave the Bundesliga team a 57th-minute lead. André Hahn then punished another error by the defender as the Foals garnered their first points.
Barcelona 4-0 Manchester City
Lionel Messi's seventh UEFA Champions League hat-trick ensured a miserable Camp Nou return for Josep Guardiola. Messi's second came eight minutes after former Barcelona custodian Claudio Bravo was sent off for handling a lob by Luis Suárez outside the area. Messi teed up Neymar, who moments earlier had a penalty stopped by Willy Caballero, for the fourth late on.
Bayern München 4-1 PSV Eindhoven
Bayern posted their first win in four as they bounced back from their matchday two setback in Madrid, Robert Lewandowski and Arjen Robben making the points safe after Luciano Narsingh had replied to goals from Thomas Müller and Joshua Kimmich.
Rostov 0-1 Atlético Madrid
Atlético were made to work before finally making the breakthrough just after the hour. Yannick Carrasco's thumping finish at the far post not only rubber-stamped the Rojiblancos' third successive victory – it also inflicted on Rostov their first home defeat in 27 games.