An overwhelming majority of third-tier clubs opted to curtail the 2019-20 season during this afternoon's vote.
The Blues haven't had a game for 13 weeks amid the coronavirus outbreak – but they'll return to action in the coming weeks.
One final spot in the Championship remains up for grabs after Coventry and Rotherham were both automatically promoted via an unweighted points-per-game formula.
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Kenny Jackett's side are joined by Oxford, Wycombe and Fleetwood in the four-team tournament.
And despite finishing fifth in the table, Pompey have already been installed as favourites by the bookmakers to make a return to the second tier.
The Blues are 15/8 with Sky Bet to lift the play-off silverware aloft at Wembley.
Jackett's troops face Oxford United, who finished fourth, in the semi-finals.
However, Pompey are fancied to come out on top, with the U's 5/2 to make it to the Championship.
Judging by the odds, Sky Bet are predicted the Blues to face Fleetwood in the final – which would be a fourth meeting between the two clubs this term.
The Cod Army have ended the league campaign in sixth, while Wycombe have somewhat controversially been propelled from eighth to third.
However, the Chairboys are 5/1 outsiders to be promoted, despite finishing highest in the table, whereas Fleetwood are a 9/4 shot.
League One play-off dates have yet to be confirmed by the EFL, although Pompey chief executive believes semi-finals will take place at the end of this month.
League Two play-off games have already been confirmed for little more than a week's time.
Colchester United will host Exeter City (5.15pm) before Northampton Town welcome Cheltenham Town to Sixfields (8pm) on Thursday, June 18.
The return legs will take place on Monday, June 22 with kick-off times the same.
Then the final goes ahead at Wembley on Monday, June 29 (7.30pm).
All games will be played behind closed doors amid the Covid-19 outbreak.