Pompey’s woes deepened tonight as they slipped further into relegation trouble with a 3-0 defeat at Rochdale.
That means the Blues are now just two points from the League Two drop zone.
And it took a late equaliser from AFC Wimbledon at Northampton to stop goals scored being the difference.
A first-half strike from Matt Lund and two goals in four minutes after the break from Ian Henderson and Peter Vincenti did the damage.
That will ensure the pressure intensifies further on manager Richie Barker as his team made it six games without a win – and three defeats on the bounce.
Barker made four changes to the side defeated by York on Saturday, as Joe Devera, Ricky Holmes, Patrick Agyemang and Wes Fogden came in for Ryan Taylor, Jake Jervis, Ben Chorley and Rhys McCabe.
It was a bright start from the visitors and it looked like it had reaped a goal, as Bondz N’Gala’s header was cleared off the line from a corner, and then Joe Devera somehow headed the follow-up over.
Pompey were left to rue that as Dale took the lead in the 15th minute when Devera was beaten at the back post from a corner – and Lund nodded home,
Carson did superbly to keep it as 1-0 after 30 minutes, when Vincenti was given time to drill a shot goalwards which the keeper was equal to.
But two goals in four minutes after the restart killed Pompey off.
Henderson’s shot after 59 minutes beat Carson, after he burst through – before more weak defending gave Vincenti an easy header.
Pompey could muster little in response, although Fogden blasted a late chance over.