I think for me what's important is the personnel rather than formation. If Ole wants to play similar to how he setup against PSG then he can deploy the same players he used in that game if he chooses to do so with a back 3. But I feel Leipzig are much better than PSG at closing off the space high up the pitch due to their well coordinated press with the whole collective moving in tandem from back to front to close off the space after the press is triggered high up the pitch. This is a team that's more dangerous off the ball than on the ball IMO and have CBs that are probably the quickest in European football which allows them to play a high line. But having said that, Konate might not be deemed ready to start the game.
I would personally hope we take the game to them and if we did decide to do that then I hope we looked at the game between Leverkusen and Leipzig earlier this season where Leverkusen were unfortunate not to win in a 1-1 draw. Peter Bosz the Leverkusen coach set his team up in a 4-1-4-1 formation and went for it by pressing high and forcing errors which made it a very uncomfortable game for Leipzig. But the formation changed from 4-1-4-1 to a 4-3-3 or even a 4-5-1 off the ball depending on which zone Leipzig were attacking from. Karem Demirbay and 17 year old Florian Wirtz were both deployed as attacking midfielders but also had defensive duties off the ball and dropped off when defending to plug up the half spaces which made it a 3 man midfield next to the DM Charles Aranguiz who played his role superbly well by controlling his zone.
What Bosz showed in the above example is that he not only imposed his style on the game but also had players in attack who had high football IQ whereby they knew when to drop off and close off the space which provided structure and defensive balance on the turn over. We have Donny Van de Beek who is that player but he might not be ready to start a game due to the very little football he's played since the Dutch season ended in March this year.
