Five extra minutes had just surfaced on the scoreboard when Jurgen Klopp left his back tired and trotted back to his seat.
He had seen enough. Liverpool's coach had spent most of the game with outstretched arms like a scarecrow screaming his rage, but it had been pointless. Klopp's team had been miserable.
As he sat down, he wondered how to make sure that Liverpool would not be eliminated from the competition that meant so much to them. A wrong move in the last two games against Paris Saint-Germain and Napoli, and the Reds could fail.
Red Star Belgrade took the lead and looked up after being paralyzed by Milan Pavkov (left)
Andrew Roberton's face summed up the feeling among the players of Liverpool after the guests quit on Tuesday in Serbia
The home fans were thrilled and the Red Star team celebrated in good shape after Pavkow's early start
Virgil van Dijk looked unusually shaky on his back and covered his head with his shirt after the Reds admitted in Serbia
This is the reality after the catastrophic 90 minutes in Belgrade, which ended with an outstanding Red Star squad that scored their most famous victory at this level – thanks to two magnificent, unanswered Milan Pavkov goals – since they raised the European Cup in 1991.
Maybe Liverpool thought it was a formality. Klopp would never entertain this suggestion, and the players would deny it, but this was a presentation that invited such stinging criticism.
The competition would certainly have been different if Daniel Sturridge had taken the opportunity in the 17th minute that he would expect with closed eyes.
It was at the end of the Liverpool turn before the break, which was fluent. The ball went to the left of Adam Lallana after Sadio Mane, and the forward cross shot past Andy Robertson past Sturridge. His shot from six yards was high and terrible.
PLAY FACTS, RATINGS, TABLE AND PLAY ZONE
RED STAR BELGRADE (4-2-3-1):
Borjan 7: Stojkovic 7, Savic 8, Degenek 7, Rodic 7: Krsticic 7 (Jovicic 73 minutes), Jovancic 7: Srnic 8, Marin 8, Nabouhane 8: Pavkov 8.5
Subs not used:
Popovic (GK), Babic, Stoiljkovic, Causic, Simic, Gobeljic
Gates – Pavkov 22, 29
Booked – Marin
Manager – Vladan Milojevic 8
Becker 6: Alexander Arnold 5 (Gomez 46 min. 6), Matip 5, Van Dijk 5, Robertson 6: Milner 5, Wijnaldum 5, Lallana 5 (Origi 79 min.): Salah 6, Sturridge 5 (Firmino 46 min. ), Mane 5.5
Subs not used:
Mignolet (GK), Fabinho, Keita, Firmino, Gomez, Moreno
Booked – Lallana
Manager – Jürgen Klopp 6
referee – Antonio Mateu Lahoz
participation – 51,318
Man of the game – Milan Pavkov
Daniel Sturridge missed a golden opportunity to put Liverpool ahead early, but his shot flew over the crossbar
Pavkov towered over the Liverpool defenders and steered his head beyond Alisson to the bottom corner
Alisson stood firm and watched as the ball snuggled into the corner and his side fell back in the game
The fans of the Red Star Belgrade made a lot of noise and made for a very hostile atmosphere for the men of Jürgen Klopp
Klopp was startled by the missed shot and a double, while Sturridge was so shocked that he put his hands over his eyes. His constant shaking of the head showed that he was playing it in his head.
How expensive it turned out. Red Star, whose fans made a tireless uproar of encouragement and intimidation, saw a chance to gain a foothold in the competition, and with more than a little help from last season's runners-up, took advantage of it.
Her first goal came after a mistake by Virgil van Dijk, who was usually a calm and relaxed character. He fluttered to Ben Nabouhane, whose shot from 20 yards away was blocked by Alisson. In the wake of Marko Marin Pavkov plundered the first of his two goals.
So big was Red Stars Delirium that some of its staff in the back room had left the line behind and landed in Klopp's engineering area, but every hassle he felt related solely to his statuesque defense.
If that was bad, it should be worse. Liverpool's midfield was overrun, but the faint manner in which Gini Wijnaldum was thrown away after James Milner's possession deserved the punishment and Pavkov's due.
Pavkov got the chance to start from Red Star manager Vladan Milojevic and took advantage of the game in the first half
The striker's second goal came just outside the penalty area when he struck a blow behind the keeper
Spirits rose among the Red Star players as they brought Liverpool's qualifying into the knockout stages
Alisson has not been on the losing side in the Premier League since joining Liverpool, but this was his second defeat in Europe
Daniel Sturridge was pushed by a swarm of Red Defenders at each opportunity before being replaced
Trent Alexander-Arnold flies in the air as he competes with Milan Rodic in a full-fledged challenge at the Rajko Mitic Stadium
Wijnaldum was desperately trying to get himself back into position. Pavkov reached out to fend off the Dutch international and fired a shot that landed in Alison's net before the keeper had finished his dive.
There is not much elegance about Pavkov, who is a great plate of a center forward, but what he lacks mercy, he makes up for with power. The celebrations were appropriately manic due to the night.
Liverpool had not come from two goals behind in a European game since April 2016 when they defeated Borussia Dortmund in the quarter-finals of the Europa League, but there was no reason to hope that they would repeat the final here.
Klopp was apoplectic on the verge, as his team on Tuesday night could find no way back into the Champions League
Mo Salah looked downcast after he hit the bar and tried to get Liverpool into the game against a tough defense
Joel Matip came on the defensive after Dejan Lovren stayed in the team hotel because he could not play because of his illness
The home crowd made a lot of noise throughout the game, even though the red star was behind the foot after the break
Milan Borjan instructs his team to calm down and calm down in the face of pressure from Liverpool
Do not fool yourself because they dominated possession in the second leg and spent the last 15 minutes launching balls towards Van Dijk, who was temporarily the fifth striker.
Red Star was never finished, he remained disciplined and persistent until the end.
If this unfortunate Liverpool appearance summed up for a moment, then it came when the unusual Mane somehow passed the ball directly out of the game and not just over the sidelines, while he was only two meters away from Klopp.
Regarding the chances to score after the break, Liverpool had the best alternative when Robertson completed a defender at the head of the bar in the 56th minute and after 71 minutes a shot from Salah shot post after a corner.
The way in which the heads fell at that time was revealing, and Liverpool have lost three away games in Europe for the first time since 1979.
Should this sequence be extended in Paris in three weeks, the impact could be serious.
The history of Liverpool is full of stories about the recovery of adversity, but if they play like that again, their campaign could be ended.
Liverpool's rise in the Champions League is hanging in the balance after the unexpected defeat in Serbia on Tuesday
The home side played well and stayed in Liverpool in the second half of the campaign