I also want to ask the same question, because as a football lover, a game where both players are equally strong will be much more exciting, the ideal composition of each team in battle will not be saturated in giving each other the best attack and solid defense. If both teams are not strengthened by superior players, it will not be very exciting and perhaps the coach will be considered careless because he wasted the opportunity, where the UCL is proof of the strength of the teams from each league. It's so strange to have to play with such a messy composition, I'm sure that won't happen. No matter how bad the club condition is when they enter the UCL, they will show their best performance compared to their performance in the Domestic League.
This is a Champions League quarter-final match and all teams are aiming for victory so it is impossible for a team to not field its best players. In fact, the coach is doing everything to improve the team's performance in a quarter-final match, especially as the opponent that Manchester City will face is one Europe's top team is Real Madrid.
The Manchester City team is currently having a bit of a problem because several of their main players are suffering from injuries, but I don't think it will have a significant impact because there are several of their supporting players who also have almost the same quality.
Not only Manchester City but several other teams that will compete in the quarter-finals are also the same, but I think that also applies to other teams, losing several main players due to injury will not cause an excessive reduction in the quality of the team and what is clear is that all the matches in the Champions League quarter-finals this season This will be quite interesting and intense, not just Manchester City's match against Real Madrid.