Pompey are heading for their second-biggest crowd of the season tomorrow.
More than 16,500 tickets have already been sold for the visit of Sheffield United.
The fixture marks the first home league match since the Portsmouth Supporters’ Trust reached agreement for the club.
It is also the last Fratton Park game of the campaign.
For the Blades, it represents a massive match as they seek to maintain their push for an automatic promotion spot and a place in the Championship next season.
So far 1,800 tickets in the Milton end have been sold, pushing the total crowd towards the 17,000 mark.
The highest attendance of the season was for the League One opener against Bournemouth in August.
Buoyed by the news Balram Chainrai had pulled out of the running to buy the club and the scenario of a south-coast derby, 17,703 turned up.
On that occasion, Michael Appleton’s men drew 1-1 with a side which is now in second spot.
The previous second-highest crowd at Fratton this season came on Boxing Day for the visit of Crawley.
There were 13,169 present to witness a 2-1 Blues defeat, Paul Benson netting for the hosts.
Last season’s final home match of the campaign against Derby attracted 17,770.
But crowds overall in the Championship were higher.