Southampton boss Russell Martin says the video assistant referee (VAR) system is a "big problem" for the Premier League if it is disallowing goals like Cameron Archer's against Brighton.
Archer appeared to have put Saints ahead at Amex Stadium on Friday, only for the strike to be chalked off when team-mate Adam Armstrong was deemed to be offside.
It took more than four minutes for the controversial decision to be made after a VAR check, with the level of Armstrong's interference with play questionable.
It left Martin furious as his bottom-of-the-table side were denied a first Premier League away win of the season as the game ended 1-1.