Saints home tie against Vitesse Arnhem is likely to sell out by Tuesday after a surge of ticket sales.
Saturday saw a surge of ticket sales for the home game with Vitesse meaning that only a few hundred tickets, maybe 400 - 450 in total, are left for the Europa League clash.
Block 44 in the Northam End and area usually given to away fans started Saturday with only a handful of seats sold in it after being released to home fans, by Sunday morning only about 40 seats are left mainly near the front.
In fact the only other areas with anything other than the odd one or two seats dotted around are the Itchen/ Chapel Corner where there are still the odd row of seats left and the family area which is where the main availability is.
Given the amount of tickets sold so far over the weekend it is hard to see there being many left after Monday and with pre match surges for tickets usually starting a couple of days before the game, Tuesday will probably see the game a sell out.