If it hadn't been for the chances lost by Celtic, the match wouldn't have end like that, it might even result to draw, but Real Madrid show how experience that they are to them. Early goal helps a lot, that is what made Chelsea loose the match, it's not that Dinamo Zagreb played with extra determination, the early goal won the match for them, if Celtic had utilize the chances that they had as well, they might have won or draw the match because they did as if they meant the match in the first half but they didn't turn their chances to anything and as a result, they loose in their very own home. It's not that Real Madrid didn't loose chances too, but Celtic had chances mire than Real Madrid in the first half.
The same thing that did Arsenal in the weekend that made them loose up to 3 goals happened to Celtic. The Celtic defence lines have attacked already, they have left the defense line in order to equalize when the match was just a goal but they later Conceded more goals as they are trying to equalize the one goal. None of the defenders have speed like Vinicius Junior, so after he had beat them, it is finished for the defenders, there is nothing they can than to run after him, but Real Madrid attackers are not dunce, they are sharp, unlike the Celtic attackers that can't even utilize their chances when they had it, the shot off target that they had is even more the the shot on target that they had.
Celtic players are good from the defense line to the midfield, the defenders and the midfielders are so much good, but they can't have success as the attackers are playing rubbish. The attackers are the ones wasting Celtic chances upon how much the midfielders played very well but still yet, no matter how good that they are, they still can't be good as Real Madrid midfielders. Real Madrid have Lucas Modric that is the best midfielders presently, so we can't compare such players to Celtic players, it's just that football doesn't care about that, footballer is not predictable, anybody can win but still we have some clubs that are extra ordinary, they have to win and that is why they are big clubs.
No one would ever predict that Celtic would beat Real Madrid, it doesn't even matter if it's their home at Scotland, no where big clubs can't find winnings. In the first half, there is no goal, but three goals came in at second half, what a wonderful and I don't think it's because there is much changes for Real Madrid, the only place where change was made is the defense line, when Rudiger entered, the only changes was in the first half and it's because Kareem Benzema can't just play on, he had to be substituted, his coach have seen that so he introduced Eden Hazard to replace Benzema. Real Madrid would have many points in that group that they have.