The Cottagers are bracing themselves for the departure of Tosin Adarabioyo after failing to reach an agreement over a new contract.
As a result, the centre-back is set to become a free agent when his Fulham contract expires at the end of June.
Newcastle United are believed to be favourites to sign Adarabioyo, who has also attracted interest from Manchester United.
While Adarabioyo is set to depart, it is currently uncertain whether Willian will follow the defender out of the door this summer.
Saudi Arabian clubs chasing Willian
The Brazilian briefly left Fulham on a free transfer last summer, before he reached an agreement over a new one-year contract.
Willian was regularly involved in Fulham's 2023-24 campaign, scoring five goals and providing two assists in 37 competitive appearances.
Fulham are believed to be keen to retain Willian's services, but they are yet to reach an agreement over a new contract.
According to The Telegraph, the former Chelsea winger has offers on the table to join the Saudi Pro League when his contract runs out this summer.
The 35-year-old will now have to decide whether to renew his Fulham for another season or try something new in the latter stages of his career.
Fulham looking to keep De Cordova-Reid
Like Willian, Bobby De Cordova-Reid is out of contract at the end of June and is yet to put pen to paper on a new deal.
According to journalist Nizaar Kinsella, Fulham have offered the 31-year-old a two-year contract as they look to extend his five-year association with the club.
De Cordova-Reid joined Fulham on an initial loan deal in 2019, before he completed a permanent transfer the following summer.
During his time at Craven Cottage, De Cordova-Reid has scored 32 goals and provided 18 assists in 209 matches in all competitions.
Meanwhile, goalkeeper Marek Rodak is likely to leave on a free transfer after being restricted to just five appearances in the 2023-24 season.