The 28-year-old joined Chelsea from local rivals Fulham as a free agent in the summer of 2024, signing a four-year contract, but has been unable to nail down a regular starting spot at Stamford Bridge. He made 16 Premier League appearances last season, only half of them from the start.
Sky Sports reports that Adarabioyo could now depart following the signing of Maxence Lacroix, whose arrival has added further competition for places in Xabi Alonso's defence.
According to the reports, Marseille and Benfica are among the clubs showing interest in the England international, who was left out of Chelsea's squad for their final preseason friendly against Real Sociedad.
Adarabioyo is not the only player facing an uncertain future at Stamford Bridge. Sky Sports also reports that forwards Liam Delap and Nicolas Jackson are likely to leave Chelsea before the transfer window shuts, while winger Pedro Neto could be sold and Mykhailo Mudryk loaned out as Alonso continues to reshape his squad.
Levi Colwill's return from injury has added to the depth at centre-back, further squeezing the space available to Adarabioyo, who remains under contract at Chelsea until 2028 should no suitable offer materialise before the deadline.
The defender previously worked under current Chelsea head coach's predecessor at Manchester City's academy before making his name at Fulham, where he helped the club win the Championship title in 2021-22 and made over 130 appearances in all competitions.
His height and aerial ability made him a regular feature of Fulham's backline before his free transfer to Chelsea, and he remains a physically imposing option even as his game time in west London has become increasingly limited this season.
Any sale of Adarabioyo would likely be recorded as pure profit for Chelsea's accounts, given he arrived on a free transfer, offering the club flexibility as it continues to balance the books following a heavy summer of spending.
Axel Disasi is also expected to leave Stamford Bridge before the window closes, adding to a broader reshaping of Chelsea's defensive options this transfer window.