Lionel Messi may have scored a hat-trick, but Barcelona's team effort showed they mean business.
Liverpool and Inter both won in added time, while Lionel Messi opened his campaign with a hat-trick.
Barcelona have three players in The Scout's first squad of the season, with two apiece from Manchester United and Dortmund.
"The most intelligent player in the world" – pass master Luka Modrić can make his 100th UEFA club competition appearance on Wednesday.
Five years to the day since his UEFA Champions League debut, we salute Paris forward Neymar.
Cristiano Ronaldo should play his first UEFA Champions League game for Juventus on Wednesday; we remember all of his first times.
It took Galatasaray nearly six hours, Dortmund 38 seconds; Real Madrid's was a tap-in, Paris's a stunner.
The set-piece threat of Cristiano Ronaldo and Sergio Ramos is well known, but who else could chip in?
Cristiano Ronaldo struck twice as Juventus, Liverpool, Barcelona, Bayern and Paris won again.
Liverpool, Barcelona and Bayern won on Saturday to join Paris with flawless league records so far this season.
Both Rennes and Jablonec qualified automatically for the group stage and will be keen to kick off with a win.
PAOK have never lost to English opposition, although that record is under threat from Chelsea, unbeaten against Greek clubs.
Dudelange are the first club from Luxembourg to reach a UEFA group stage, and first assignments come little bigger than AC Milan.
Real Madrid have won the last three editions of the competition but have a new look for their opening game with Roma.
The UEFA Europa League's most successful club, Sevilla's first group game in four years pits them against Standard Liège.
Valencia mark their group stage return after three years with a home game against Juventus and Cristiano Ronaldo.
Arsenal's first European contest without Arsène Wenger since 1996 pits them against Ukraine's Vorskla Poltava.
Young Boys's first reward for finally reaching the group stage is a high-profile contest against Manchester United.
Celtic and Rosenborg know all about each other ahead of their Group B opener having been regular recent opponents.
Having lost all six games in their 2017/18 group, Benfica will be looking for a positive start at home to Bayern.
Manchester City and Lyon meet for the first time with the home side looking to mount another strong challenge this season.
Shakhtar will be looking to extend a solid home record against German visitors as they take on debutants Hoffenheim.
So impressive at home in the UEFA Champions League, Barcelona welcome a PSV side who have never won in Spain.
When Internazionale last welcomed Tottenham in the UEFA Champions League, Gareth Bale illuminated the occasion in defeat.
Monaco finished bottom of last season's group, although Atlético Madrid also suffered an unexpectedly early exit.
Club Brugge and Borussia Dortmund will both be looking to make a positive start to Group A in Belgium.
Group C kicks off with a heavyweight contest as 2017/18 runners-up Liverpool welcome Paris to Anfield.
Several of Europe's biggest clubs impressed this weekend, but it was a different story for the likes of Tottenham and Napoli.
Several of Europe's biggest clubs have kept up perfect starts to their domestic seasons this weekend.
Liverpool, Paris, Real Madrid, Bayern and Juventus are among the #UCL contenders that kept up perfect starts on Saturday.
Liverpool make it four wins out of four today after Roma and Lyon suffered setbacks on Friday night.
Liverpool and Paris made it four wins out of four as Bayern stayed perfect and Inter triumphed: the #UCL contenders' weekend results.
Liverpool and Paris both made it four wins out of four as Inter triumphed: the #UCL contenders' weekend results.
How did the UEFA Champions League hopefuls fare in domestic action this weekend?
Atlético's Antoine Griezmann tops the list of the best ten players in the 2017/18 UEFA Europa League.
Real Madrid v Roma and Liverpool v Paris will be among the matchday one highlights.
Luka Modrić has won the 2017/18 UEFA Men's Player of the Year award.
Cristiano Ronaldo has once again been voted UEFA Champions League Forward of the Season.
Real Madrid begin the new season with the highest UEFA club coefficient for the fifth year in a row.
Cristiano Ronaldo's overhead kick for Real Madrid against his current club Juventus has been voted UEFA.com Goal of the Season.
The group stage squads will be confirmed at the start of next week – we explain the process.
A fourth successive home victory will take Salzburg past Crvena zvezda and into a first group stage in 24 years.
Bayern's Polish striker Robert Lewandowski turns 30 today; has he earned his place among the club's all-time greats?