This needs to be properly analyzed before we go and spend big on this guy.
The way we defend will make any defender in the world looking like shit.
a 29 year old who will start to get slower soon in a much quicker league than Serie A with zero resale value in 3 years in a team where there are next to nothing help from defensive midfield...
We might be putting extreme amount of pressure on Koulibaly to fill a gap which gap is caused by the tactics and our pressing and off the ball workrate, discipline from attackers, midfielders, fullbacks not only CB's...
Clearly Pep does not trust Stones and Otamendi anymore. But I am 100% sure Koulibaly will look worse in a defence like ours then in a defence like Napoli who play slower football, are hit much less with counters as they play less attacking football than us, in a much slower league and with more help provided for defenders than here where Gundogan is hardly helping hile Rodri is just not a top class DM who is screening defences.