Gus Poyet's men defeated their non-league counterparts 4-0 at Gigg Lane to set up the tie which will take place on the weekend commencing 8th January.
Given the small capacity of the Withdean Stadium, it is likely that Pompey fans will receive a meagre ticket allocation of less than a thousand. So it'll be interesting to see how these tickets will be allocated to the more loyal Pompey supporters.