Federation Internationale de Football Association are reportedly planning to investigate Paul Pogba's world-record move from Juventus to Manchester United last summer.
It remains to be seen if the Pogba transfer comes under the scrutiny of the British tax authorities at a time when they are investigating a number of deals in English football.
Pogba moved to Old Trafford for £89.3million last August, but reports from earlier this week have cast a shadow over the deal.
The claims will be explained in greater detail in a forthcoming book called "Football Leaks: The Dirty Business of Football", written by two journalists from German newspaper Der Spiegel. The question is simple.More news: Haniyeh Elected Meshaal's Successor while Authority Siege Hamas Through Taxes
United also agreed to pay Juventus £4.5m in performance-related bonuses plus other costs, including another £4.5m if Pogba signs a new contract.
Asked if the stories had affected him or Pogba, the United manager said: "No".
Clarke has defended United's decision to spend big on agent fees and says football must have a debate if the sport's governing bodies want to address the issue.
When contacted by the BBC, Raiola declined to comment and said the matter was in the hands of his lawyers.More news: Indian and Pakistani Army trade fire on LoC in J&K
After a protracted transfer saga, lasting several weeks, Pogba eventually signed for United last August and has so far appeared in nearly 50 league and cup games this season.
"I just think picking on one transfer and demonising it is not that helpful. We have no further comments at this stage".
Rooney accepts United's top-four tilt is all but over, with Europa League glory offering the most likely route back to where "this club belongs", the Champions League.
This is made of "a near £23m slice of the transfer fee and five instalments totalling £16.39m from United over the course of his contract".More news: Le Pen's father says her stance on euro, Europe undermined her