Wigan manager Roberto Martinez has been fined £2,250 after criticisng the reasoning behind referee Stuart Attwell's decision to send off Gary Caldwell.
The Wigan defender was dismissed for a foul on Carlos Tevez during March's 3-0 defeat to Manchester City which Attwell adjudged to have involved a two-footed challenge on the Argentina striker.
The Wigan boss was charged with improper conduct after venting his fury after the match, claiming that Attwell was 'lying' for making a decision on something he did not see.
After being contacted by the Football Association about his strongly-worded comments, he subsequently told Sky Sports News: "I will never question a referee's decision, but what I was really disappointed with was the reasoning of that decision.
"It was clear to see and everybody will have their own opinion on whether it was a red card offence or not, but the reasoning was that it was a two-footed challenge by my player.
"It is quite clear that was not the case. If anyone goes two-footed it was the opposing player, and that is why there was disappointment and anger."
But at an Independent Regulatory Commission of the FA on Wednesday, Martinez was fined and warned as to his future conduct.
A statement on the FA's official website said: "At a personal hearing today the charge was proven and, taking into account Martinez's previous exemplary record, the Commission warned him as to his future conduct and fined him the sum of £2,250."