West Brom boss Tony Pulis said he had to "bite my tongue" after the High Court ruled he must pay his former club Crystal Palace £3.7 million.
Pulis had earlier this year been ordered to pay the sum in damages to Palace by a Premier League Managers' Arbitration Tribunal.
The West Brom boss had claimed that the decision was unfair and mounted a challenge in the High Court, but judge Sir Michael Burton ruled against him after a hearing in London.
Arbitrators concluded: "By any standards his conduct (prior to and during the litigation) has been shown to be disgraceful" and that he had not been "committed to the club" when he quit in August 2014 after receiving a £2m bonus, but he denied the claims.