Saliba is one of the key players in Arsenal, so this will be difficult to let him go at his high performance.
Arteta was already prepared for the worst to let him go if Real Madrid pressed on, but they did not, and that is lucky for Arsenal because it now gives them more options of quality defenders to use in important games.
If Saliba does stay at Arsenal, then their defenders will certainly be much stronger. Saliba will most likely be paired with Calafiori who they just signed up for their back line. This is already quite enough. Both are top Centre-Backs, their ages are also not much different, 23 and 22 years old. So, their cooperation will be much faster. However, Calafioru's position is wider, because he can also be included in the Left Midfield or Left-Back position.
Well, in case, with their respective main positions, some of the biggest possibilities for Arsenal's lineup for their main lineup will be like this:
Possibility lineup by transfermarkt
Todd Boehly has invested a lot of money now to build Chelsea into a title contender, but Todd Boehly should also have the patience to see Chelsea become champions in the future because after all investing a lot of money does not guarantee that they will immediately become champions in leagues and European competitions, because it takes a lot of time for the process of developing a team and this is not easy to do although they have a great coach,
This is why, in this transfer market, Chelsea also recruited many players who are still very young. There are even 3 players who are still under 20 years old. While in other positions, they also recruited players who are not actually top but they have the talent, and their age is still very productive. And 1 more, they seem to not intend to spend too much money for just 1 player. That is why Chelsea is very careful in making decisions regarding Osimhen who until now has not been done deal.
check here:
Source: Chelsea FC Arrivals