The Ghana international was in superb form for his club last season. He netted 19 goals and provided seven assists from 42 appearances.

He has made the decision to pursue a new challenge this summer. Brighton were earlier interested, but they could not convince him.

The Hammers have now agreed terms with the 23-year-old star, and they are currently in discussions with Ajax over a deal worth £35m.

Chelsea are also firm admirers of the talented attacker. They expressed an interest earlier this summer, but have yet to make an offer.

The west London giants could make a late approach to hijack the deal after missing out on signing Michael Olise from Crystal Palace .

The Blues made the decision to trigger the release clause in Olise's contract, but pulled out of the transfer after tapping up accusations.

The Frenchman has now signed a long-term contract with Palace.

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