Jeremie Boga has attracted interest from Atalanta and Napoli, among other European clubs, but the winger's agent is unclear if Chelsea will activate a buy-back clause.
The 23-year-old has impressed in Serie A since joining Sassuolo for £3.5million, including scoring eight goals in the currently suspended 2019-20 campaign.
He had scored four goals in his last six games ahead of the stoppage in play due to the coronavirus outbreak which included scoring a decisive fourth goal in Sassuolo's 4-2 win at home to Roma.
Boga moved to Italy in 2018 after making just one first-team appearance during his time at Chelsea, having spent time out on loan at Rennes, Granada and Birmingham City.
The Premier League club reportedly has a €15 million (£13m/$16m) option to sign the player back, though Boga's brother Daniel - who also serves as his agent - is unaware if a return to Stamford Bridge is likely.
Asked in an interview with Calciomercato if Chelsea do not intend to trigger the clause, he replied: "This, at the moment, I can't tell you."
If the Blues decide against a return to England, Boga seemingly has other options on the table - including two of Sassuolo's top-flight rivals in Italy.
Daniel Boga revealed he has held talks with both Napoli and Atalanta - plus "other European clubs" - but there had been no contact yet with Milan, despite speculation they want the forward.
"As far as Milan is concerned, I haven't had any contact with them yet. I don't know if they are really interested in Jeremie," he said. "You have to look at what the sporting project will be, but Milan is a great club. It can always be interesting."
One other Serie A club who are interested in Boga are Roma, who have already spoken to his representatives about a potential move.
The Ivory Coast international has attracted further interest from Premier League clubs Brighton and Everton but he is understood only to be a low priority target for the Merseyside club at this stage.
Sassuolo have resumed training ahead of a possible return to action in Serie A in June. The league has been suspended since March due to the coronavirus pandemic.