Cristiano Ronaldo scored twice with his head and Angel Di Maria also grabbed a double as Real Madrid maintained their winning start in the group with a thumping 4-0 victory over FC Copenhagen.
Portugal forward Ronaldo followed up his hat-trick in the opening 6-1 drubbing of Galatasaray with another sparkling display and Di Maria also turned in a fine performance in the absence of injured world-record signing Gareth Bale.
Ronaldo’s first goal came in the 21st minute when goalkeeper Johan Wiland failed to deal with Marcelo’s floated cross and he nodded in from a tight angle. Copenhagen’s resistance was effectively ended when Ronaldo powered home a Di Maria centre in the 65th minute.
The Argentine winger netted a fine curling effort six minutes later and another in the first minute of stoppage time as Real secured a maximum six points from their opening two matches.
Roberto Mancini made a dramatic start as Galatasaray coach when his team took a shock lead and then fell behind before scoring a late equaliser in a 2-2 draw at Juventus.
Didier Drogba pounced on a defensive blunder in the first half to open the scoring for Galatasaray.
The visitors held on until Arturo Vidal levelled with a controversial penalty in the 78th minute and Juve then went 2-1 up with a Fabio Quagliarella header in the 87th.
The Italian team barely had time to celebrate before Umut Bulut took advantage of more slack defending to score, leaving Juve with two points from two games in Group B and Galatasaray with one.
A Zlatan Ibrahimovic double inspired a brilliant Paris St Germain to a 3-0 home win against Benfica.
Ibrahimovic, who scored in the fifth and 30th minutes, also initiated the second goal with a clever back heel as PSG stayed top of Group C with a maximum six points from two matches.
The Swede opened the scoring when he tapped in from Gregory van der Wiel’s cross and Marquinhos doubled the tally in the 25th, also from close range before the Sweden striker headed home the third to wrap it up.
Olympiakos are second in the group after beating bottom of the table Anderlecht 3-0, thanks to a Konstantinos Mitroglou hat-trick.
Benfica are third place on three points.