The club record signing is in the squad for the match at Inter and could make his long-awaited Saints bow.
Southampton's record signing had been on the radar of a number of London clubs, said Yvan Le Mee.
The Frenchman becomes the Saints fifth signing of the summer.
Sofiane Boufal has reportedly rejected a move to Leicester City in order to join Southampton.
Southampton look set to break their transfer record.
Southampton look set to break their transfer fee record for Sofiane Boufal.
Southampton are reportedly hoping to sign Lille's Sofiane Boufal.
Southampton have been repeatedly linked with the 22-year-old.
A select round-up of the latest news relating to Tottenham Hotspur…
Clinton N'Jie is also expected to head to Marseille in the next day or so.