The Hammers and Bayer have confirmed a fee has been struck for Chicharito.
BILD says it will be between €16-20 million, with a Monday medical slated for the Mexico international.
And it's also been revealed Bayer players will not shed any tears over Chicharito's departure.
It's claimed Hernandez was not a particularly popular teammate and was accused of playing for himself by many inside the Bayer locker room.
Having signed Chicharito from Manchester United for €10m, Bayer are delighted to be making a healthy profit on his sale.