A game that began and ended in a torrent of noise. The important part, though, was what came in between. Three second-half goals and an immaculate display of second-half possession gave Real Madrid the perfect start to their title defence. Was it deserved, did it follow the run of play, did it make any kind of sense? For Madrid, these are questions that have long since ceased to trouble them. This is simply what they do. They enter your house, sniff the air, and then take what they came for.
For Celtic, a valuable learning experience at the highest level. The roar of pride and belief that greeted them at the final whistle was a deserved salute for a team that had left every fragment of themselves on that Parkhead pitch.
They had run and hustled and competed with this great Madrid side for almost an hour. Had they managed to take their chances, they might even have won. But in this rarefied air, those are the narrow hinges of success and failure. Celtic knew how to start. Madrid knew how to finish.
“The first goal was always going to be important,” lamented Ange Postecoglou, who refused to be too heartened by the performance. For this is a growing side, a learning side, a side still accustoming itself to this kind of challenge.
Most of all, they will remember the incredible swell of noise and fervour that began this game, back when the night still felt alive with colour and possibility. The East End had been waiting for this. Five years for the Champions League proper, nine since their last group-stage victory on home soil, and the classic anthems were greeted with a stupendous din from a crowd that senses its team may once again be capable of greatness.
Celtic came to play. They did not charge recklessly into the game, they did not simply hack long balls up to the returning Giorgos Giakoumakis. Postecoglou has taught them better than that. Instead they passed it through midfield purposefully, waited out the spells of Madrid possession, tried to hit the wide open spaces behind their high line. Reo Hatate even had the audacity to dispossess the great Luka Modric when he dithered on the ball in his own half. From front to back, Celtic were showing the 14-time champions a magnificent disrespect.
There were chances too, good chances: a couple for Liel Abada, a couple for Hatate, a shot from the captain, Callum McGregor, that cracked against the inside of the post. Madrid were further discomfited by an early injury to Karim Benzema, who collected a knock to his knee, limped around for a while and eventually came off for Eden Hazard.
So Real retreated into their tried and tested patterns: Toni Kroos dropping into left-back, Ferland Mendy stepping up to support Vinícius Jr, and all of a sudden Real had a ticking bomb on that flank. If the left-wing is their chaos, the right-wing is their sanity: Modric and Fede Valverde steadily building play, probing for gaps, always unbalancing, always tilting the pitch.
Over time, order was established. Madrid finished the first half the stronger and never relinquished that sense of control. The rusty Hazard was gradually discovering some rhythm, and was involved in the counterattack that produced the first goal.