Bookmakers Marathon Bet, also know as Panbet, scored an Albion own goal on Saturday as the firm displayed a huge advertisement supporting Brighton and Hove Albion’s promotion rivals Middlesbrough.
Marathon Bet has its head office in Davigdor Road, Hove.
The company does, however, have sponsorship deals with Liverpool, Manchester United and Boro.
The ad outside the Riverside Stadium read “Don’t feed the Seagulls – Good luck Boro in your promotion push from the team at Marathon Bet.”
The betting company has been in existence since 1997. It specialises in the Asian and Russian markets. It has been at its Hove base for a number of years.