Pompey showcased a clinical edge to breeze past AFC Wimbledon and move to within a point of the League One summit.
They had seven shots on target at a wet and windy Fratton Park, converting more than half of them to record a 4-0 victory.
John Marquis, Ryan Williams and Sean Raggett all found the target before the break, with Ben Close coming off the bench to wrap things up late on.
And Joe Gallen was delighted with the ruthless streak Pompey displayed to continue their run of fine league form.
Pompey’s assistant manager said: “After the first 20 minutes I was thinking it could be a tough evening and there weren’t too many chances in the game.
“They came here with five at the back and loaded up in midfield, so we were going to have to do well to get in front.
"It was incisive passing – one and two-touch stuff – and then some brilliant finishing. The lads did extremely well."
“But the quality of those first two goals that we scored really made the difference – they were excellent.
“It was incisive passing – one and two-touch stuff – and then some brilliant finishing. The lads did extremely well.
“Ryan’s was a hell of a strike out of nothing, while the move from one side of the pitch to the other for the opener was great.”
Gallen was full of praise for Williams, who followed up his assist at Fleetwood on Saturday with the goal of the game against the Dons.
He said: “Ryan’s gone into that more central role and it just seems to have clicked for both him and the team.
“His pressing and closing down from the front are really good, but his confidence and quality have also risen.
“The goal was supposedly on his wrong foot and he’s been leading the line very well with John – now they have to keep it going.”