What is clear in this match is that they are only conducting trials for each team and I am sure that Real Madrid will not use the players they used in this pre-season match. Manchester City and Real Madrid will use their main players who are stronger and their mentality is no longer in doubt, but I must admit that Milan's performance was quite good when they beat Real Madrid and Man City, they are trying to use various strategies to prepare for next season.
It is no need to explain again indeed that Milan has always been a strong competitor to win the Serie A scudetto from year to year with its tough rivals Juventus and also Inter Milan.
Teams like Real Madrid or Man City will not show their best performance in pre-season matches, they will only make some changes and this is different from AC Milan who are looking for their best performance with their new coach. However, even so, what has been seen in several pre-season matches, AC Milan's performance deserves to be appreciated, they played quite well and this is an indication that they will be able to do better next season and are ready to compete for the Serie A title.
I also think that the wins they got against Real Madrid and Manchester City in the friendly matches were very valuable. Even if it was a friendly match, beating such big teams shows that you are ready for the season. Milan fans should be very hopeful for this year, they are one of the biggest candidates in the championship race. Also, their squad is almost ready, they don't need to make any transfers. I hope they will be successful in the Champions League.