Upamecano is world class. A 23 terry/ferdinand aren’t that much different to a 30 terry/ferdinand in terms of ability, they are already world class at that age.
Even if there exist tiny marginal difference between the ability of Upamecano and Koulibaly. Is that margin worth losing us over £60m of transfer fee and give up £80m of selling profit (£140m in total)?
If you use that attitude to buy other players, we are going to give up £140m after £140m.
Aouar is performing like a prime modric at the moment. Why not getting him instead of spend on let say an expensive prime modric, which their ability is almost identical?
Upamecano has a lot to learn. Both him and Konate has massive positional issues and have the tendency to make errors and lose concentration. He is good on the ball, but I have a feeling that there are better young centre backs out there. Probably alot cheaper too.