Swansea have signed Dutch goalkeeper Erwin Mulder on a free transfer, the Premier League club have announced.
Sunderland striker Jermain Defoe has completed a free transfer to Bournemouth on a three-year deal, the club have announced.
Ngoy, signed by Stoke from Brugge as a 15-year-old in 2013, is seen as one of the best young prospects in Europe.
West Ham co-chairman David Gold has told talkSPORT the club are "desperate" to sign strikers with Premier League experience.
West Bromwich Albion are closing in on the signing of Southampton striker Jay Rodriguez, sources close to the player have told ESPN FC.
Selling Alexis Sanchez to Man City could be the final straw for Arsenal fans in their fractured relationship with the club.