Jurgen Klopp was left with his head in his hands as he watched Andy Robertson leave Liverpool's defence exposed before Julian Alvarez's equaliser.
Robertson pressed aggressively as Kevin de Bruyne received the ball on the halfway line but did not get there in time as the Belgian fed the ball on to Riyad Mahrez out wide. The Scot left a gaping hole as Manchester City exposed the space to work the ball into Alvarez in the box to slot beyond Alisson and restore parity in the game.
As soon as Robertson pressed De Bruyne, the nearby Klopp could be seen with his head in his hands on the touchline before making his unhappiness clear. And Reds legend Jamie Carragher shared similar frustrations watching on as he tweeted criticising Robertson for repeating a mistake he has made many times before - including in the Champions League final.
Carragher wrote: "Andy Robertson goes chasing into midfield & leaves his man, it happens a lot. (CL final). You can’t always press!"
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Whilst Robertson made the initial mistake, Virgil van Dijk also came in for criticism from former Manchester City defender Joleon Lescott on BT Sport at half-time for failing to stop Mahrez, whilst Ilkay Gundogan and Jack Grealish garnered praise for their well-worked passes in the move.
Lescott said: “Huge phase of play. You can see here, Klopp’s reaction, he recognises what’s about to happen with regards to Robertson missing the tackle.
“Then Van Dijk, he needs to isolate Mahrez but from then on, Gundogan’s pass, Jack’s weighted pass then Alvarez just finds himself in huge amounts of space which is strange from Liverpool. Again, the goal from a defensive perspective is pretty poor.”
Guardiola's reaction to Alvarez's goal also garnered plenty of attention. The Spaniard celebrated in the face of Liverpool substitute Kostas Tsimikas as he walked past him on the touchline.
The City boss was criticised instantly for his actions as ex-Manchester United defender Rio Ferdinand suggested he was fortunate Tsimikas did not react.
Ferdinand said: "That celebration there, I don't know how Tsimikas hasn't pushed the opposing manager, Pep Guardiola, out the way.
"But he seems happy. He can see that's a fantastic team goal, really well-worked from Man City and he couldn't contain himself."