Manchester United target Viktor Gyokeres is reportedly furious with his current club Sporting Lisbon over their handling of his potential exit this summer.
Gyokeres has been linked with a move to the Premier League, with United moving ahead of the likes of Arsenal and Chelsea in the race for his signature.
The Swedish striker has a €100m (£84m) release clause in his Sporting contract, but he is understood to have reached a gentleman's agreement with the club at the start of the season over a reduced asking price.
Gyokeres was promised that he could leave Sporting this summer for €60m (£51m), plus €10m (£8m) in add-ons, to take the overall transfer fee down to £59m.