The Championship play-off final may not go ahead on Saturday 23 May as the English Football League (EFL) investigates the Spygate scandal surrounding finalists Southampton.
A hearing will take place on or before Tuesday 19 May.
Saints have been charged by the EFL with breaking rules by observing one of Middlesborough’s training sessions before last Saturday’s semi-final first leg at the Riverside.
Southampton are due to face Hull City in the play-off final for a place in the Premier League next season.