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.
West Ham United have signed English midfielder Ossama Ashley from AFC Wimbledon on a free transfer.
Atalanta have signed Russian midfielder Aleksey Miranchuk from Lokomotiv Moscow for €14.5-million.
Birmingham have signed midfielder Adam Clayton on a two-year deal after his contract at Middlesbrough expired.
PSV Eindhoven have signed left-back Philipp Max from Augsburg for €10-million.
AS Monaco have signed striker Kevin Volland from Bayer Leverkusen for €11m on a four-year contract.
Celtic FC have signed centre-back Shane Duffy from Brighton on a season-long loan.
Besiktas have signed Spanish defender Francisco Montero from Atletico Madrid on a season-long loan.
Lazio have signed Ivorian midfielder Jean-Daniel Akpa Akpro from Salernitana for an undisclosed fee and Argentine midfielder Gonzalo Escalante from Eibar on a free transfer.
Sheffield Wednesday have permanently signed English forward Josh Windass from Wigan Athletic for an undisclosed fee.
Hellas Verona have signed defender Koray Gunter from Genoa for €2-million on a three-year contract.
Kayserispor have signed Congolese winger Harrison Manzala from Angers for an undisclosed fee and Ghanaian midfielder Joseph Attamah from Istanbul Basaksehir on a season-long loan.
Benevento have signed striker Gianluca Lapadula from Genoa for €4-million on a three-year contract.
Hellas Verona have signed defenders Giangiacomo Magnani, from Sassuolo, and Mert Çetin, from Roma, on season-long loans.
Rotherham have signed goalkeeper Viktor Johansson on a two-year deal following his release by Leicester.
Wycombe have signed former Manchester City goalkeeper Curtis Anderson on a one-year contract.
Sheffield Wednesday have signed Congolese forward Elias Kachunga from Huddersfield Town on a free transfer.
Crotone have signed centre-back Luca Marrone from Hellas Verona for €1-million on a two-year deal.
Augsburg have signed Polish full-back Robert Gumny from Lech Poznan for €2-million.
Fortuna Dusseldorf have signed German winger Edgar Prib from Hannover on a free transfer.
Kasimpasa have signed Hungarian winger Kevin Varga from Debrecen for €850k.
Wycombe Wanderers have signed Irish winger Daryl Hogan and English defender Ryan Tafazolli from Hull City, both for undisclosed fees.
Kayserispor have signed English winger Aaron Lennon from Burnley on a free transfer.