A £25 million signing from Toulouse three years ago, the 24-year-old attracted interest from Manchester United thanks to a storming debut season in England, but he's fallen down the pecking order more recently, making only 18 Premier League appearances for David Moyes' Hammers last season.
While Wolves look well-stocked at centre-back at present, Willy Boly has been linked with a move to Tottenham - now managed by former Wolves boss Nuno Espirito Santo - so they could find themselves having to go into the market.
Palace, meanwhile, have just completed the signing of Marc Guehi - arguably the outstanding defender in the Championship last season while on loan at Swansea from Chelsea - a move which ought to see them drop any interest in Diop. Strengthening at centre-half wouldn't appear to be a particularly key need for Southampton either.
Besides, while Moyes didn't often turn to Diop last season, there is a slight lack of depth at the back for West Ham. With January signing Frederik Alves seemingly one for the future, and veteran Winston Reid having spent the end of 2020/21 on loan at Brentford and perhaps set to depart permanently, it might only take one injury for Diop to find himself thrust back into the starting 11.
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