The transfer window will open for 10 weeks, starting on the 27th of July 2020 and ending on the 5th of October 2020 in most countries in Europe.
Southampton have signed right-back Kyle Walker-Peters permanently from Tottenham for £12m on a five-year contract.
Stoke City have signed defender James Chester on a permanent deal from Aston Villa on a free transfer.
Leeds have signed forward Joe Gelhardt from Wigan for an undisclosed fee on a four-year contract.
Villarreal have signed midfielder Takefusa Kubo from Real Madrid on a season-long loan.
Mainz have signed centre-back Luca Kilian from Paderborn for €2m on a four-year contract.
Gillingham have signed Arsenal centre-back Zech Medley on a season-long loan.
Braga have signed winger Nicolas Gaitan on a one-year deal following the expiry of his contract at Lille.
FC Kaiserslautern have signed Czech left-back Adam Hlousek from Viktoria Plzen on a season-long loan.
Leeds United have re-signed winger Jack Harrison from Manchester City on a season-long loan.
SL Benfica have signed goalkeeper Helton Leite from Boavista and right-back Gilberto from Fluminense, both for undisclosed fees.
Nottingham Forest have signed midfielder Jack Colback on a free transfer from Newcastle.
Livingston have signed former Rangers midfielder Jason Holt on a two-year contract.
Brest have signed centre-back Christophe Hérelle from Nice for €5m on a four-year contract.