Morecambe have sold just four tickets for their first-ever fixture with Pompey.
Jim Bentley’s side travel to Fratton Park on Saturday on the back of a 1-1 draw with Torquay last weekend.
A Shrimpers crowd of 1,555 witnessed that result, their first home game of the season.
Now they visit Guy Whittingham’s Blues with an away following which is expected to reach double figures.
Advance ticket sales are being handled by Pompey rather than Morecambe in the build-up to the game.
A pay-on-the-day option is also available to visiting supporters making the journey from Lancashire.
At present, however, the Blues ticket office are reporting just four have been sold.
Of those, one is for a wheelchair user, who will be located in the disabled section in the front of the Fratton end.
The current tally is in contrast to the 2,500 tickets Oxford bought for the League Two opener.
The U’s presence helped swell a Fratton crowd to 18,181, a record in the present League Two format.
Pompey ticket sales for Morecambe’s visit are currently standing at 12,433.
That includes 10,602 season ticket holders.
However, there are 156 seats for Saturday still remaining in the Fratton end.
Tickets are priced at £20 for adults, £15 for seniors (aged 60 or more) and young persons (17 and over), and £5 for juniors (under-17s).
Morecambe took 54 to their previous away fixture, a 1-0 defeat at Wycombe on the opening day of the season.
Last year they averaged 1,954 at the Globe Arena.
Although they did have a crowd of 2,545 for the recent Capital One Cup clash with Wolves, Bentley’s men running out 1-0 winners through Ryan Williams’ goal.