Manchester United defender Timothy Fosu-Mensah has told BBC Sport he is praying for former Ajax teammate Abdelhak Nouri.
Midfielder Mukhtar Ali has completed a permanent transfer from Chelsea to Vitesse Arnhem.
Teenage midfielder Dan Crowley has left Arsenal to join Willem II on a three-year deal, the Dutch club have confirmed.
PSV Eindhoven have announced the signing of Marco van Ginkel from Chelsea on a season-long loan.
Ajax midfielder Abdelhak Nouri has suffered "severe and permanent brain damage," after collapsing during a preseason friendly game on Saturday.
Arsenal youngster Dan Crowley is set to leave the club to join Dutch side Willem II, sources close to the player have told ESPN FC.