Anthony Knockaert joined Nottingham Forest on loan from Fulham until January.
The 28-year-old winger’s move sees him reunite with Chris Hughton, who took control of the City Ground earlier this month.
Knockaert played under Hughton at Brighton, where they jointly won promotion to the Premier League in 2017.
Fulham did not sign a permanent contract with Knockaert until July, paying Brighton £ 10million following a successful loan.
The former France Under-21 international played 46 times for Fulham set to win the play-offs last season, but had not made a Premier League appearance for them so far this campaign.
A statement from Fulham read: “Everyone in Fulham wishes Anthony the best of luck while he is in Nottingham.”
Knockaert joins Cyrus Christie, Fulham’s right-back who joined Forest on loan earlier in the window at City Ground.
Kongolo joins Fulham
Fulham has re-signed defender Terence Kongolo from Huddersfield for an initial £ 4million plus additions.
Manager Scott Parker was keen to strengthen his defense after a poor start to life in the Premier League.
Defenders Tosin Adarabioyo and Joachim Andersen joined Fulham on deadline day from Manchester City and Lyon respectively.
But Parker has once again decided to step up his options with the signing of Kongolo.
The 26-year-old joined Fulham on loan in January but broke his foot and returned to Huddersfield after making just one appearance for the Cottagers.
Kongolo started his career in his native Netherlands with Feyenoord and made more than 130 appearances for the club before moving to Monaco and then Huddersfield.
He made 45 Premier League appearances for Huddersfield during their two-season stint in the top flight.