Pep Guardiola cut a frustrated figure on the Manchester City bench after Real Madrid scored twice in just two minutes with assistant coach Juanma Lillo bearing the brunt of his anger.
City got off to the perfect start at the Bernabeu as Bernardo Silva caught the hosts napping with a cheeky free-kick inside two the opening two minutes.
Real were stunned, but the Spanish side showed their Champions League pedigree by responding just 10 minutes later with a long-range deflected effort from Eduardo Camavinga.
The Bernabeu erupted two minutes later when Rodrygo was released down the left before the squeezed the ball past Stefan Ortega to give Real the lead.
Pep Guardiola was seen in a heated exchange with Juanma Lillo
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Carlo Ancelotti was jumping around his technical area to celebrate with his coaching staff.
But Guardiola's mood was very different in the opposite dugout as he was seen arguing with Lillo.
The two appeared to be debating something with Guardiola emphatically arguing his point and Lillo waving his hands to seemingly disagree.
City's preparations were dealt a huge blow just hours before the big game in Madrid with Kevin De Bruyne named on the bench.
The Belgium international has been key to City's title charge since returning from his long injury lay-off and would have been expected to start against Real.
But Guardiola revealed before kick-off that De Bruyne was throwing up in the changing room just before the match started.
“He feels unwell," he said.
“We made a meeting, he was ready, and when we arrived, in the locker room he started to vomit and he said: 'I'm not ready'."
Speaking earlier this week, Guardiola looked back on City's previous meetings with Real with a rallying cry to his own side.
The two were in a debate after Rodrygo's goal
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“Two years ago we went out in the last minutes, last year we won,” he added.
“We have the same managers but we have new players, they have new players.
“We have a little advantage that we play second leg at home where we feel strong and incredibly confident but we have to play 90 minutes here.
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Pep Guardiola got the better of Real Madrid last year
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“They will press high, so aggressive. They are so dangerous. If you make good progress they will drop.
“Everybody knows, not just Pep, the strength they have on the transitions. They have incredible pace.
“At the same time, you have to try to punish them, hurt them and make them feel we are here to score goals. Real Madrid can control many aspects but we have to impose who we are.”