Diego Simeone was handed a red card after flying into a rage which appeared to be sparked by a Liverpool fan in the crowd in chaotic scenes after the Reds' late winner against Atletico Madrid.
The long-time LaLiga manager was forced to watch his team's full-throated comeback was left in ruins thanks to the latest of goals by Liverpool captain Virgil van Dijk.
As Anfield went wild however, Simeone seemed incensed by the crowd behind him, and was seen engaging with a passionate fan on the sidelines.
Taunted by the jubilant home faithful, the Argentine was held back by stewards, but wrestled free of the grip of his coaching team to appear to make an obscene middle-finger gesture at fans in the stands.
Simeone was eventually being handed a red card by referee Maurizio Mariani, and dismissed with seconds left to play at Anfield.
On commentary for TNT Sports, Darren Fletcher watched with amazement as Simeone departed down the tunnel.
'Simeone's in the crowd!' the commentator informed the viewers - and co-pundit Ally McCoist. 'He's absolutely lost the plot. I don't know what's been said to him.'
Fletcher added: 'I think he feels like he's been wronged in some way, by the people on that side - all we do know is that he's been sent off.'
Simeone might have thought an all-important point in his first league phase tie was in the bag after an impressive comeback after the Reds started proceedings on top.
Andy Robertson put the hosts ahead in just the fourth minute, with Mohammed Salah netting a second two minutes after that.
But after Liverpool saw a penalty shout overturned by VAR in the 36th minute, momentum began to swing towards the visitors.
Marcos Llorente scored for the Spanish side three minutes into added time, before adding a second to his tally in the 81st minute.
But with moments to go on the clock, Van Dijk stepped up and forced a towering headed past Jan Oblak to see Arne Slot's side claim victory in the most dramatic of fashion.
Kimcikpsty
1
Fans with insulting gestures provoked him 1st and must be penalized for that.
kmuguna
2
So it's true Someone is easily irritated and frustrated?
Hamabdmtu
1
in sometimes animals are even much better than Simeone the way he sometimes behaves and even his team never play beautiful game instead they like playing dirty football and that's what he teaches them. But what i am always like is that, playing a champions league final match at their stadium only that's what they are good at.
Neadenpstu
1
Animals are the Hooligans fans of Liverpool and all of England
Who got sent off you fn idiot
Miukrt
1
Animals are the Hooligans fans of Liverpool and all of England
Widbiltz
0
Every time Someone came to Anfield he behaved like an animal
pls don't say,he's a respectable coach
zotdoruz
0
Liverpool seems dangerous in the last five minutes of the games.
naaabeknpy
4
Every time Someone came to Anfield he behaved like an animal
Wekkrsty
1
This guy is a fighter