Pompey Academy’s free-scoring start to the season continued, although they fell behind before thrashing Newport 6-3 at Copnor Road.
The visitors scored against the run of play with their first real opening, only for the Blues to blow them away with a ruthless spell of finishing before the break.
Alfie Stanley has been in prolific form this season and took his personal goal tally to 14 from just 10 games with a hat-trick.
Harrison Brook and Eoin Teggart also found the target, before County reduced their deficit late in the first half.
An unlikely comeback might have been on the cards for the Welsh side when they netted again following the restart.
But right-back Harry Kavanagh ended their hopes by firing home a free-kick to wrap up the goal-fest.
Professional development phase coach Liam Daish said: “We started the game really well and had all of the possession, only for Newport to score on their first attack.
“But the lads kept believing in what they were doing and Alfie got his hat-trick. He’s a great finisher and took his chances well.
"A few goals are being conceded and we need to brush up a bit on our defending, but we’re looking really dangerous at the other end."
“We were finding a lot of joy down the right, with Harrison and Eoin adding more goals and it was pretty comfortable.
“Our opponents got a couple back, but Harry scored from a free-kick, which is something he’s done before this season.
“We changed our shape a bit and went to a 4-4-2, but the lads adapted well to that and we were in control throughout the game.
“A few goals are being conceded and we need to brush up a bit on our defending, but we’re looking really dangerous at the other end.
“Things did get a little bit niggly towards the end and perhaps we lacked some focus in the closing stages, which was a bit disappointing.
“But we remain unbeaten in the league and are top of the table, so other teams want to be the first to take three points off us.
“It’s a good learning experience for the boys because they have to cope with that pressure, remaining disciplined right the way through.”
Pompey: Pitman; Kavanagh, Robb, Rew, Kelly; Brook (Bell 46), Storey, Bridgman, Teggart; Stanley (Lee 46), Anderson