During a hectic transfer window, when United spent £178 million on four new players, SEG worked on player sales and signings. Vos was a frequent visitor to Old Trafford and the team’s Carrington training facility. Their efforts comprised:

acted as Rasmus Hojlund’s agent during his £72 million transfer from Atalanta; the Danish striker joined the firm a month before he signed with United.

representing United in negotiations with Fiorentina for the loan signing of Sofyan Amrabat, with the possibility for United to make a permanent signing of the Moroccan international at the conclusion of the season.

Zidane Iqbal, a United midfielder, was sold to Utrecht in June, just two months after joining the agency from riva

Selling United midfield player Zidane Iqbal to Utrecht in June just two months after the 20-year-old had joined the agency from rivals CAA Base.

Manchester United staff are concerned about the growing involvement of Erik ten Hag’s agent Kees Vos (left) in the club’s transfer activity

Ten Hag has previously been criticised for his tendency to focus on signing players he has already worked with. Antony and Lisandro Martinez both followed him from Ajax last year.

SEG were also involved in negotiations to sell Harry Maguire to West Ham before talks collapsed

United sources said that it is not unusual for top clubs to have strong links with particular agencies due to personal relationships formed by their key personnel, which often brings advantages in the transfer market.

While acknowledging that the close relationship with Vos had become a talking point, United insisted that their senior leadership are comfortable with the position.