Paul Ince's agent has slammed the League Managers' Association after the MK Dons boss was snubbed at this week's awards ceremony.
Ince was the only coach who led his side to a division win not to receive a gong.
And his agent Steve Kutner said: "I consider it sinister that every manager who won a league title - from the Premier all the way through - was named LMA manager of the year, except Paul.
But the League Two award went to Graham Turner, whose Hereford side finished third in the table.
Kutner added: "I have nothing against Graham and I'm sure he's done a first-class job.
"I just can't understand how Paul could have been overlooked for this award given the season he's had. I'd like someone to explain it to me."
LMA chief executive, Richard Bevan, insisted Ince has not been the victim of discrimination but admitted the voting system may be reviewed next season.
Bevan said: "The votes are cast by each manager in the individual leagues for one of their peers."
Shocked former Watford and England striker Luther Blissett said: "Paul has the ability to become the first black English manager in the Premier League.
"If he had won, it would have sent out a very encouraging message to young black coaches."