Pompey have sold out for their first-ever trip to Cheltenham.
The Fratton faithful have snapped up all 1,550 tickets on offer for Saturday’s Whaddon Road fixture.
It continues the phenomenal away support the Blues have attracted in League Two this season.
In their previous league outing at Mansfield, 1,005 supporters ordered tickets in advance.
While 1,001 turned up at Accrington for the televised 12.15pm kick-of, a match which was also pay on the day.
In addition, Tuesday’s Johnstone’s Paint Trophy clash at Torquay attracted 372 visiting fans.
At Fratton Park, the average attendance over the three matches played so far is 16,257.
Now Cheltenham is next on the map for the Pompey hordes to invade, cheering on Guy Whittingham’s side.
Tickets have also gone on sale for the September 14 visit to Burton Albion.
The Blues have been allocated 1,730 tickets for their first-ever trip to Burton (3pm), which can be bought in advance.
Seating is priced £18 for adults, £16 for seniors (65+) and young persons (17-22) and £8 for juniors (under 17).
A place on the terraces costs £15 for adults, £13 for seniors and young persons and £5 for juniors.
Tickets can be bought from the website portsmouthfc.co.uk or the Frogmore Road ticket office.
Meanwhile, Pompey will discover their Johnstone’s Paint Trophy opposition on Saturday.
As ever, the draw will be shown live on Soccer AM, with the Blues in the Southern Section.
Fellow first-round victors Brentford, Dagenham & Redbridge, Leyton Orient, Wycombe, Plymouth and MK Dons will also be among the teams in the draw.
The second round will take place on the week commencing October 7.
Those clubs who won in the first round this week each receive £5,000 in prize money.
This will be increased to £7,000 for the latest stage.
Pompey went out to Wycombe 3-1 at Fratton Park at the same stage last year.
The Blues had previously knocked out Bournemouth on penalties.