[3] On 25 June, Everton announced that they had agreed a deal with AS Monaco to extend the loan of Djibril Sidibé until the end of their season.

[4] On 29 June, AS Monaco confirmed this, along with Gil Dias' loan being extended until the end of the 2019–20 La Liga season.

[7] On 1 July, AS Monaco confirmed that the loan deals for Pelé, Jordi Mboula and Antonio Barreca had all been extended until the end of their respective seasons.

[13] On 13 August, Francesco Antonucci left AS Monaco to sign for Feyenoord,[14] whilst Lyle Foster made a permanent move to Vitória de Guimarães.

[17] On 26 August, Wilson Isidor joined Bastia-Borgo on a season-long loan deal,[18] whilst Jonathan Panzo left the club to sign for Dijon.

[23] The following day, 11 September, AS Monaco announced the signing of Vito Mannone on a two-year contract after his Reading contract had expired at the end of the previous season,[24] whilst Adama Traoré moved permanently to Hatayspor and Jean Marcelin joined Cercle Brugge on a season-long loan deal.

[43] Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.