The FA's gambling probe into Lucas Paqueta centres on suspicious bets on the Brazilian being booked in three West Ham matches, including their opening game of this season.
Mail Sport has learned that a five-month investigation exploded into life after an integrity alert was triggered on bets for Paqueta to be booked at Bournemouth 11 days ago, which he was in the last minute of the 1-1 draw.
Paqueta was booked in all three games that are being investigated by the FA, which is believed to have caused the 11th-hour breakdown of a £85million move to Manchester City that had been agreed by the clubs.