Marseille are interested in signing Moussa Dembele and have made the Celtic striker their number one target this summer, Sky sources understand.
The French club want to sign Dembele as a replacement for Bafetimbi Gomis, who was sold to Galatasaray for £3 million at the end of last month.
Dembele scored 32 times in 48 games last season as Celtic won the treble in an unbeaten season.
Chelsea and West Ham United tried to sign the 20-year-old striker in January and AC Milan are one of the clubs who have expressed an interest in buying him this summer.
Celtic signed Dembele last summer by paying a £500,000 development fee after his Fulham contract expired. He has three years left on his Parkhead contract.
Hoops manager Brendan Rodgers has admitted that some players may leave the club - but only after the qualifying rounds for the Champions League.