David Norris was the late, late hero as Pompey recorded a 1-0 win at Burnley.
Norris grabbed the late winner at Turf Moor to banish the Blues’ status as having the worst away record in the Football League.
The skipper smashed in a rasping 25-yarder at the death to give Michael Appleton’s men victory against the in-form Clarets.
That ended the Blues’ search for an away win which stretched back to March.
It was just what Pompey deserved against Eddie Howe’s side as they had the better of the match.
Pompey had the clearer chances throughout with Luke Varney going close early on.
Varney then hobbled off with a knee injury after being clattered by Lee Grant as he burst through.
Pompey’s football was attractive throughout, and Erik Huseklepp nearly made the breakthrough with an angled drive 11 minutes after the restart.
Claims for a penalty were ignored following good work by George Thorne in the box with 18 minutes left.
But the breakthrough came in dramatic style at the death to give Pompey a richly deserved three points.
That leaves Pompey 16th in the table on 26 points going into the south coast derby.