Paul Pogba completed a world-record transfer from Juventus to Manchester United last summer but according to reports the deal is now the subject of a FIFA inquiry.

Football’s world governing body has written to the Premier League club “to seek clarification on the deal”.

It is believed to concern who was involved in the £89.3m transfer, and how much money was paid to them.

A United spokesman said: “We do not comment on individual contracts. Fifa have had the documents since the transfer was concluded in August.”

Paul Pogba returned to the club last summer for a world-record fee of 105m euros after leaving in 2012 due to ‘lack of respect’

United also agreed to pay Juventus 5m euros (£4.5m) in performance-related bonuses, and other costs, including 5m euros if Pogba signs a new contract.

When they confirmed the transfer, Juventus said the “economic effect” to their club was “about 72.6m euros”.