Chelsea threw away a two-goal lead against Roma before recovering to draw 3-3 in the Champions League on Wednesday, while Juventus laboured to a 2-1 win at home to Sporting Lisbon. It was easier for Paris Saint-Germain and Bayern Munich. The German side beat Celtic 3-0 and PSG won 4-0 at Anderlecht to remain perfect.
Manchester United also made it three wins out of three with a 1-0 victory at Benfica, as did Barcelona, which beat Olympiakos 3-1, despite playing the entire second half with 10 men.
Elsewhere, Atletico Madrid looks to be heading for an early exit after drawing 0-0 at Qarabag. Basel won 2-0 at CSKA Moscow.
Here's a closer look at the groups:
PSG continues to go from strength to strength in the Champions League and it currently sits atop Group B with 12 goals for, none against and three victories. Kylian Mbappe scored after less than three minutes before setting up Edinson Cavani for a close-range header shortly before halftime.
The world's most expensive player, Neymar, also had his moment in the second half — sending a low free-kick under the soaring defenders and past goalkeeper Matz Sels in the 66th minute. Angel Di Maria rounded off the scoring two minutes from time.
Bayern remained three points behind PSG after a comfortable win in Jupp Heynckes' second match in charge and moved three points above Celtic. Anderlecht is still without a point.
Heynckes, who retired after guiding Bayern to the Champions League, Bundesliga and German Cup treble in 2013, has the German powerhouse running smoothly again after taking over from Carlo Ancelotti, who was fired after the side's 3-0 defeat at PSG.
Thomas Mueller and Joshua Kimmich put Bayern 2-0 up inside half an hour and Mats Hummels wrapped it up when he headed in a corner shortly after the break.
Chelsea salvaged a point against Roma when Eden Hazard headed in his second goal of the night in the 75th minute.
Edin Dzeko's double had briefly put Roma in front but 2012 Champions League winner Chelsea remains two points ahead of the Italian club at the top of the group.
Chelsea had made a blistering start at Stamford Bridge with David Luiz curling a shot into the bottom corner after 11 minutes.
Hazard doubled the Premier League champions' lead but Aleksandar Kolarov pulled one back for Roma five minutes before halftime.
Atletico Madrid is three points behind Roma after being held 0-0 by newcomer Qarabag, which earned its first point in its third game.
The match was marked by the disputed dismissal of Qarabag forward Dino Ndlovu, who was judged to have dived in the 75th minute, drawing his second yellow card of the night.
Barcelona remained three points ahead of Juventus, with Sporting three points further back. Olympiakos has zero points.
Mario Mandzukic scored the winner for the Italian side six minutes from time after free-kick specialist Miralem Pjanic had cancelled out an own-goal by Juventus defender Alex Sandro in the first half.