 On 22 November, Sidibé headed home Benjamin Mendy's cross for Monaco's first goal in the 48th minute and provided the assist for Thomas Lemar in the 53rd minute to enable Monaco to defeat Tottenham Hotspur 2–1 at home in the 2016–17 UEFA Champions League group stage Group E matchday 5 match and ensure that Monaco would finish on top of Group E at the conclusion of the group matches on 7 December.In his first season with Monaco, Sidibé played an integral role as the Principality club won the Ligue 1 title for the first time in 17 years and he was named to the UNFP Ligue 1 Team of the Year.On 7 August 2019, Sidibe joined Premier League side Everton on an initial season-long loan; the deal included an option to make the move permanent at the end of the loan.