it makes sense for Monaco to delay any more outgoings for as long as possible so long as it doesn't effect them bringing others in and getting them a good pre-season. There's a lot of teams after a lot of their players, Mendy,Sidibe,Fabinho,Bakayoko,Lemar and Mbappe are all heavily linked with moves away on top of who they've already sold, and i've probably missed a few.
Monaco's entire plan is to sell to sustain but losing 7/8 of their starting 11 after winning the title is too much for anybody. If they sell Mendy and someone like Bakayoko to Chelsea it gives encouragement to the clubs lurking around the other players and potentially has those players that remain questioning whether they should also leave. The less time between them being seen to be selling their assets and the window closing the more chance they've got of keeping the ones they want to keep this summer.
As long as we were confident we had the deal in place with the player, there's been no reason for either side to push through this transfer so far. Now that pre-season is upon both teams though, it's time to get this done. I expect a few signings this week, Alves and Mendy for sure, hopefully more. We'll be able to tell which of our targets we have a problem with getting if they're not signed before we fly to America.