Manchester City is a very strong team, they have dominated almost all local and international competitions, but when they faced Madrid last time, many people criticized Haaland's performance. The fans especially regretted why Haaland was only able to create a few opportunities, here i saw that the one who actually fought in every match was the coach of each team, Ancelotti and Pep Guariola were great coaches, both of them were difficult to beat.
Haaland is known as a great player in small matches 
. When facing big teams, most of Haaland cannot develop his strength. Part of it is because Haaland's playing style is quite dependent on midfielders to spark him, he is not the type of player who can create his own opportunities.And most big teams have very strong midfields and the ability to control play well. It is not easy for Mancity's midfield to exploit and create regular opportunities for Haaland, which makes it very easy for Haaland to inhibited above.
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Today Man City will face Luton, this will be an easy match Man City will definitely try hard to get lots of goals in this match.
Luton is too weak compared to Mancity, they are in the group struggling to stay relegated. In addition, Luton is one of the worst away teams in the Premier League from the beginning of the season until now, so I think this match is too easy for Mancity.
Although Mancity does not have the services of Phil Foden, Kyle Walker and Nathan Ake. But Luton is even worse as they are being devastated by an injury storm, they have lost half of their pillars.