The Hammers will be taking part in the Europa League next season.
Southampton reportedly bid for the talismanic Dutch striker.
The Welsh superstar left Tottenham Hotspur in 2013.
Manchester United seem keen to land the player who was once on their books.
Aitor Karanka's men are gearing up for their return to the Premier League.
West Bromwich Albion continue to be linked with the West Ham United player.
HITC Sport understands Charlton have rejected initial bid.
Could Daniel Levy be biding his time because he knows Vincent Janssen wants to move to Tottenham Hotspur?
Leeds United's new first team coach handed Fulham's number 1 his first taste of the Football League at Accrington.
Both Newcastle United and Aston Villa face a tough season ahead in the Championship and a striker swap could suit both sides.