Manchester United recorded their biggest Champions League victory since 2020 as they swept Sabah FK aside 4-0 at Old Trafford.
The Azerbaijan champions came through four rounds of qualifying to reach the main league phase of the tournament for the first time.
However, though they had chances, they were also given a brutal lesson in the gulf in class between the level they are used to and the Premier League, whose five entrants have all opened their respective campaigns by picking up three points.
With just three days to prepare for Sunday's Manchester derby, United head coach Michael Carrick would have been pleased to effectively kill the contest by half-time, thanks to goals from Matheus Cunha, Bruno Fernandes and Benjamin Sesko.
For Sesko in particular, it was an important night.
Starting for the first time since 3 May, the Slovenian brought a focus to United's attack which has not been evident for their opening three Premier League games.
It surely puts him in contention to start against Manchester City, which begs the question who will be on the left - Cunha or Marcus Rashford, who remained on the bench throughout.
The conundrum is one Carrick will relish because, while he said at Everton on Sunday that United's start to the season had "not been that bad", he also knows four points from three games cannot become four from four.
As far as the Champions League goes, United could not have asked for more accommodating opponents after more than a thousand days out of the competition.
With trips to Atletico Madrid, Como and Sporting Lisbon ahead, plus home games with Roma and Bayern Munich, victory was important to ensure there was no early ground to make up, as is now the case in the Premier League.
It probably will not stay that way, but nestled just behind holders Paris St-Germain and Barcelona in the table, United's first match round in the league format of the competition looks pretty good from their perspective.
Kane scores in rout as Bayern Munich beat Bodo/Glimt
England captain Harry Kane scored his 55th Champions League goal and Michael Olise struck twice as Bayern Munich began their campaign by comfortably beating Bodo/Glimt.
Vincent Kompany's side will be looking to improve on last season, when they reached the semi-finals.
They made the ideal start to the league phase with this victory against Norwegians Bodo/Glimt, who put up stubborn resistance in the first half but were then overwhelmed.
Jamal Musiala - making his first start of the season - struck early in the second period when Kane's shot deflected kindly for him.
That was a historic goal as it was Bayern's 900th in Europe's premier club competition, with only Real Madrid having scored more.
Kane then got his goal when he headed in a free-kick, taking his haul to 55 in 71 Champions League appearances.
It means he is the third fastest player, in terms of games played, to reach 55 goals in the competition - after Erling Haaland in 49 matches and Ruud van Nistelrooy in 70.
It was also his 34th European goal in 39 games for Bayern Munich.
Bodo/Glimt rarely threatened but did go close to a spectacular goal midway through the second half when Andreas Helmersen spotted Manuel Neuer off his line and went for the lob from halfway, but the ball landed on top of the net.
Alphonso Davies added a third for Bayern in style with a rocket of a shot from the edge of the box, before Olise sent a neat finish into the top corner.
A difficult night got even worse for Bodo/Glimt in the final few minutes when Odin Bjortuft was sent off for a foul on Olise, who got his second goal in stoppage time.
Como ease past Leipzig in dream European debut
Como made an impressive Champions League debut by defeating visitors RB Leipzig 4-1 in their opening league-phase outing at Stadio Giuseppe Sinigaglia.
Goals from Martin Baturina and Tasos Douvikas in the first half gave the debutants a 2-0 lead before Assane Diao and Maximo Perrone added to the scoreline after the break on a historic night for the Italian club on the shores of Lake Como.