[6] Following a difficult season, and a video posted on the Instagram account of a friend of Tavares where Grimaldo was referred to in derogatory terms, Benfica decided to sell the player in spite of his public apologies.

[14][15][16] Tavares scored his first goal on 23 April 2022, through a calm tap-in after David de Gea had saved Bukayo Saka's curl in the third minute of an eventual 3–1 home win against Manchester United.

[17] On 30 July 2022, Tavares moved to Ligue 1 club Marseille on a season-long loan;[18] he wanted to have the option to sign permanently at the end of the deal, but Arteta refused to sanction it.

[22][23] On 2 January 2023, however, in the last minutes of a 2–1 away defeat of Montpellier – he had opened the score at the start of the second half – he gave away a penalty after deliberately kicking Arnaud Souquet in the box and was consequently sent off,[24] being handed a three-match ban for his actions two days later.

[37][38] Tavares was involved in the Amazon Original sports docuseries All or Nothing: Arsenal, which documented the club by spending time with the coaching staff and players behind the scenes both on and off the field throughout their 2021–22 season.