Manchester City's superb victory over Atleti Madrid could have come at a cost, with the club's manager admitting that they are in big trouble because of injuries picked up in the Spanish capital.
Kevin de Bruyne and Kyle Walker were forced off as City staged a defiant defensive display to claim a0-0 draw at the Wanda Metropolitano, securing a 1-0 aggregate win.
The extent of the injuries was not revealed, but with the FA Cup semi-final against the Reds to follow, it was obvious that he was concerned.
The Reds made seven changes from their 2-2 draw at City on Sunday, as they rested a number of key players for their last-eight clash with Benfica.
The test against the Spanish champion was tough.
It is the third time in Manchester City's history that they are in the semifinals of the European competition.
We played three days ago, traveled, came here and have a lot of injuries, and I don't know what will happen in the next weeks.
We can't play all the time and score four or five goals, we are human beings, and we come from a difficult game againstLiverpool.
We are in big trouble.
The second leg in Madrid was a tough one for City, who had to contend with a side that was much more ambitious than they were in the first leg.
Felipe was shown a red card for a dangerous follow-through on Phil Foden, who drew blood, after earning his first yellow card for an elbow to the same player.
There was a confrontation between the players and those on the benches after the second yellow. Jack Grealish had his hair pulled by a former City defender in the melee.
There were reports of more violence and police having to intervene, as well as a suggestion that liquid was thrown at him as he headed for the tunnel.
The City boss said that everyone saw the action, but he had nothing to say.
It is the champion of Spain and they played with energy and, in the second half, were better than us. We had chances in the first half, but we are in the semi-finals.
The opponent is so tough that all the teams in the group stage suffer here.
The FA Cup semi-final is the latest in a crucial run of games for City as they look to claim a trophy.
The top two teams in the league are separated by just one point with seven games remaining.
Both teams are in the last four of the European competition, with City looking to win the tournament for the first time, and on course for a final meeting withLiverpool.
John Stones was superb in Madrid, producing an intelligent and resolute display, typified by a block to prevent a goal by Matheus Cunha in the second half.
He too wanted to focus less on the unsavoury aspects of the game and more on his side's achievement - one that showcased a maturity and clear growth to compete on Europe's biggest stage.
It was not an easy place to come, it was a hostile environment, and how we defended and controlled ourselves over the two legs was incredible, according to Stones.
We know that they try to make things happen like that and we dealt with it well.
It is not nice to talk about and I don't want to dwell on it because over the two legs we played incredible against such an experienced side in what they do.
Foden was praised by Stones, who was the spark off the bench that helped fashion City's winner in the first leg.
The England centre-back said that Phil was a threat in both games and that he was feeling it now.
Ian Dennis is a senior football correspondent for Radio 5 Live. It was a chaotic finish. That was a bad finish to the game.
There were periods of play in the last moments of the game. The support from the fans was amazing.
I don't think I have seen anything like this in all my years playing and watching football, says Chris. To see a team lose at home is incredible.
We talked about the dark arts, but Man City saw it through. They were tested all the way.
Man City didn't have the control in the second half. You felt that it was building for Atlante and then Felipe cost them. Man City was scared by what happened.
The main thing for Man City is over the line.
Rio Ferdinand, a former Manchester United defender, said that the players from Atleti should be embarrassed with their behavior.
You have to say, talking about football, well done to Atleti Madrid as they made Manchester City play in a way we haven't seen for a long time, took them out of their rhythm and their stride.
Some of the stuff towards the end was not what you want to see.
That, at the end, from Atlante Madrid was a disgrace.
They played so well in the game that they don't need all the antics.
Joleon Lescott, an ex-Manchester City defender, said that he couldn't condone the last 10 minutes of the second leg.