FIFA have began investigation into Manchester United's deal to sign Bruno Fernandes in January because Italian side Sampdoria believe they are entitled to a cut of the money.
United paid Sporting Lisbon £47million up front to take the midfielder to Old Trafford.
Sporting signed the Portugal International from Sampdoria for £7m in July 2017.
Therefore, the Serie A club claim they are owed £4m because of their apparent 10 per cent profit sell-on clause, and they have asked the governing body to help reclaim it.
There is no indication that the Red Devils are liable for any money.
A FIFA spokesperson said: “We can confirm that on April 3, 2020 the Italian club, UC Sampdoria, lodged a claim with FIFA against the Portuguese club, Sporting Clube de Portugal, related to financial obligations set out in the contract corresponding to the transfer of the Portuguese player, Bruno Miguel Borges Fernandes.
“The matter is currently being investigated and consequently we cannot provide further comments.”
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According to ESPN, Sporting are denying the claim because they believe they are innocent of any wrongdoing.
This article was most recently revised and updated 1 year ago