Saints have less than 100 tickets left for the trip to Bramall Lane on Tuesday to take on Sheffield United.
Saints will be backed by well over 4,000 fans in the Capital One Cup on Tuesday night and with only a day before the game, there are now less than 100 tickets left.
These can be bought at St Mary's up to noon on the day of the game if there are any Saints supporters who fancy going who have not bought a ticket yet.
Saints poor run of form hasn't dampened the fans enthusiasm with the Chelsea home game also selling out over the weekend.