the club must have second-tier players who have the same qualities as their main squad. at least every position should have a proper replacement.
Not to mention, this season it looks like the players will also be bothered with the Qatar world cup agenda. It looks like the league schedule in Europe will clash with FIFA's agenda.
Serie A teams are not as strong as Premier League teams. There are few star players on the team. But the quality of the teams is almost equal. AC Milan, Inter Milan, Juventus, Napoli, Lazio, and Roma are all performing well. AC Milan, Inter Milan, and Napoli battled for the title last season. However, Juventus and Roma have strengthened themselves for next season. And so I think the next season will be more competitive than the last season.
This season the competition for the Scudetto is not only dominated by Milan, Inter, Juventus and Napoli. Roma will try to get into the ranks of the teams competing in the top four. Mourinho is a very experienced coach, the rise of Roma will make other teams have to be wary of the new power Roma formed with Mourinho.