Paul Pogba's world‑record transfer from Juventus to Manchester United last year is the subject of a FIFA inquiry.
Football's world governing body has written to the English Premier League club to seek clarification on the deal.
Pogba is in his second spell at Old Trafford, having left the club for Juventus for £1.5M in 2012.
Manchester United will take on Tottenham at 3.30am Monday.
Source: BBC
