Eintracht Frankfurt striker Sebastien Haller will only sign for West Ham United if his contract at the club includes a release clause. 

According to a report from German outlet Kicker, as cited by Inside Futbol, the forward remains unconvinced about the prospect of arriving at the London Stadium and will have specific conditions for the terms of any deal. 

Haller enjoyed a fantastic season with Eintracht last season and linked up well with Luka Jovic, who completed a big-money move to Real Madrid earlier on in the summer transfer window. 

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The French forward has emerged as West Ham’s top striker target, and some reports have even suggested that they will tie up a deal for the player on Friday with a €40 million offer on the table. 

However, it seems there will be some details that must be ironed out before a move is completed, with Kicker adamant that Haller is reluctant to agree to join Manuel Pellegrini’s side until he receives assurances about a release clause.

Why Haller would be a great signing for West Ham