The issue of these star players playing individual football instead of displaying good team work has become an issue that is affecting their performance as a team, this is what Alonso has to deal with and I hope he finds a solution soon as the season gets underway.
I believe if Xabi Alonso notices his players are playing individual football instead of team football next season, he will call them into order, and if any player feels that he's too big to follow Xabi Alonso's tactics, Xabi Alonso will have no option but to drop that particular player from his squad and use the player who will listen to him and fit in with his tactics.
Can he? That is the real question. Surely he will have some hard time with the players and he may have issues that he may not do that great. Xabi did not manage some huge team before, which means that he never had this type of trouble, we need to be careful.
If we are not careful, then we are going to see him be trumped by the players. Players may not care, and they may just want to get rid of him. Team would be forced to send Xabi away, instead of bunch of players, which is harder. I am not sure if he can actually get himself heard. You can be hard on players, like tell them to get a hold of themselves, but when you are doing that, players needs to know they are aware you are doing it because of the teams betterment and everyone's favour.