Momo Diame is upset with West Ham United management over a row regarding his buyout clause.
The Daily Mail says Diame is threatening to report West Ham to FIFA over fears the club are trying to renege on his £3.5million release clause.
The tough-tackling midfielder, who is interesting a number of Premier League sides, is free to leave Upton Park if a club matches the stipulated fee.
But Diame suspects West Ham are ignoring the agreement as they continue with their attempts to keep him at Upton Park.
But the Hammers are trying to sign Diame to a new contract in a bid to get rid of the release clause.