Former Hull and Newcastle forward Hatem Ben Arfa will not be able to play for Nice this season under FIFA rules.
Hull are in talks to sign Aaron Lennon on loan from Tottenham for the rest of the season, Sky sources understand.
Adrian Mutu's move from Cesena to Genoa has fallen through after the Grifoni club pulled out of the transfer.
The Romanian striker was on the verge of completing his transfer to Liguria only for the deal not to materialise, much to the disappointment of Cesena.
Cesena are eager to sell some of their top stars after following their relegation from Serie A last season.
"With regards to Adrian, we had a deal agreed with Genoa," Cesena president Igor Campedelli said to Sky Italia. "However, everything then collapsed.
"Mutu is on the market and we'll see what happens between now and August 31."
Mutu, 33, moved to Cesena from Fiorentina last summer and scored eight goals in 28 league appearances for the Seahorses.
The former Chelsea player has one year left on his contract with Cesena.