Maybe he was on free and Fiorentina buy him...im not sure, i must tested.
He is put proper in Juventus, you can see in changes.txt
"PLAYER" "Mattia" "De Sciglio" "A.C. Milan" "" "" "" "" "" "" "Juventus"
Boateng, Bobadilla, Guardado... and many players you can see your free transfer players. Some of players can't be free, some of them can't transfered in new team Emre Mor etc...
When you start australian league, i see all transfers from changes.txt
Belhanda, Gomis, Fernando, Ndiaye are already in Galatasaray
Maicon not exist in database
Asamoah not signed yet (last offer Galatasaray send tonight for Asamoah)
added 0 minutes later
Not confirmed yet