According to The Scottish Sun, Southampton are open to letting goalkeeper Fraser Forster join Celtic on a permanent basis in order to land Olivier Ntcham in exchange.
The Saints have been tracking the French midfielder since February and will step up their interest this summer as manager Ralph Hasenhuttl wants him to replace want-away captain Pierre-Emile Hojbjerg.
Celtic are said to be prepared to let Ntcham leave, with the 24-year-old declaring last summer that he wants to play in a more competitive league in order to boost his chances of breaking into the France national team.