Le 10 Sport says West Ham have opened talks with Clermont for the 23 year-old attacker.
Clermot are reluctant to lose Bayo in January, though will sell if West Ham meet their €20m valuation.
However, they could push to have the 23 year-old loaned back to them for the remainder of the season.
The Irons are one of three Premier League clubs in contact with Clermont.
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