Marseille want to sign Matteo Guendouzi from Arsenal, with the French club said to be interested in a season-long loan deal.
The 21-year-old has not played a single minute for Arsenal yet this season.
The France U21 international last featured for Mikel Arteta's side in the Premier League in June, during the 2-1 defeat away to Brighton on June 20.
He was involved in a fracas with Seagulls forward Neal Maupay, appearing to grab his opponent's throat after the final whistle at the Amex Stadium.
Reports in France earlier this summer claimed that Guendouzi said he would be open to leaving Arsenal during a disciplinary meeting at the club, following the incident at Brighton, but Arteta later dismissed the speculation.
Guendouzi, who joined the Gunners from Lorient in 2018, is under contract at the Emirates Stadium until 2022.
The midfielder has played 82 times for the club in all competitions, scoring once and making five assists since his debut in August 2018.
Meanwhile, Bayer Leverkusen remain in talks with the Gunners over signing Sead Kolasinac.
Lyon president Jean-Michel Aulas has said Arsenal are "too far away" from Houssem Aouar's value, after they reportedly tabled a £30m bid for the midfielder.
Arsenal are also keen on Atletico Madrid's Thomas Partey.
Summer transfer window - key dates and times
The summer transfer window closes at 11pm on Monday October 5 with a feast of activity lined up on Transfer Deadline Day on Sky Sports News and across our Sky Sports platforms.
A domestic-only window for deals between the Premier League and EFL then runs from October 5 and closes on Friday October 16 at 5pm. Follow all the news and analysis on SSN and across Sky Sports' digital platforms, including with our dedicated Transfer Centre blog.