West Ham, Fulham and Everton are among the clubs who have checked on Toulouse defender Issa Diop.
The 21-year-old has also been followed by Arsenal, Tottenham, Inter Milan and Barcelona over the past few months.
The towering defenderf is good in the air, adept on the ball and quick. He has been capped at U21 level and is considered a leader at Toulouse where he has helped them to stay in the top flight of French football.
Toulouse recognise he is one of their most saleable assets and are willing to listen to offers but want £26million.