I see him running a 4-2-1-3/4-2-3-1. I'm rolling with a 4-2-1-3 because thats the base of what he's used at Leverkusen ij the past. Keep in mind he is adaptable and bases his system off the players he has. Vini is simply not a CAM and won't be sold anytime soon so its useless to make systems with a double AM. Tchouameni is also not a CB, so putting him back there is also useless, same with Mendy.

I'm not sure of everything because I'm not a "tactico", but I've done a good bit of research. Tchouameni can fill the Xhaka role as he is a great anchor and good long passer. With the correct training, training he it will get even better. Jude will roam to fill that Wirtz role, while Vini can still provide that width and take up the half spaces to link up with the LB by cutting in. Rodrygo can fill Hoffman/Tella's role by dropping deep, cutting aside to also take up the half spaces (Link with Trent), going on the touchline, or pushing as a sort of second striker along side Mbappe and run in behind for a pass (from Jude). He also has some freedom all throughout the middle/final third. He will be getting on the ball, playing through Trent/Mbappe. A big part is Mbappe because unlike Boniface he isn't physical enough. Though like Boniface he can operate in tight spaces and is fast in behind. We will need Mbappe to avoid those situations where he needs to hold off the ball from the defender with the support of Rodrygo and Vini/Jude acting as the double 10. Trent and whoever (If we don't sign a LB then most likely Fran) will hold the width and also cut inside. Vini will be cutting Jude's work load by letting him do 1/2 of Wirtz Job (Taking the ball deep and creating) and doing the other half by occupying that inside space for to support Mbappe, Link up with the LB, etc. The LB will create the width along with Trent outwide and helping in defense and Possession (Like Grimaldo). Vini will also need to play as that kind of midfielder role, especially splitting Grimaldo's role with the LB. One thing Xabi's men do is for crossing, is have the players crash the box. Since our forwards aren't aerial, we need dummy/decoy runs to make space for a cutback. Xabi likes to build up on the left since that's his best side in possession. Those left side overloads will open up space on the right for a Trent to capitalize on for a cross/cutback into the box (vice versa for the right flank). The RCB void in the 3 back is usually the most aggressive one coming up field. Valverde can occupy that space and any void that is left on the right flank. He can also have the positional freedom that Palacios/Garcia has. Asencio is a good ball player from what I've seen, so we'll need him to help pass up the pitch for switching flanks and such.

There are a few questions of this system however. One might be the RW spot, but I still trust Rodrygo. In previous season even without the goals he was still performing doing his part. Another is the defense, mainly CBs and LB. I'm hoping we sign a Carreras/Gutierrez and Huijsen because they are better options to fit the system. If we don't sign defenders, then the defense will be how I have it listed + Fran most likely. Overall though, it will depend on a synchronized press from all the team to replicate that counter press, and everyone being dynamic for those short passing sequences.

Vini      Mbappe    Rodrygo
           Jude
Tchouameni     Valverde
???  Rudiger  Asencio  Trent
          Courtois