Pompey were at their clinical best to see off Birmingham and reach the second round of the Carabao Cup.
Ellis Harrison’s brace and a fine strike from Ben Close saw them easily deal with their Championship opponents at Fratton Park.
The visitors had made plenty of changes to their side for the contest, with a lot of young players involved.
But summer signing Marcus Harness was still pleased with the way they went about their business to get the job done.
The winger said: “We were happy to win in a professional manner and also get the clean sheet that we were looking for.
“I’m buzzing for Closey and Ellis to get their goals and it’s great that we’ve got our place in the next round.
"We did well not to let them back into the game. We finished positively and showed just how strong we are."
“We noticed before the game that it was a young Birmingham team, but that didn’t really change how we went about things.
“It was about turning up and doing the right things, which is what the manager asked of us. If you get that base, then the goals will come.
“We did well not to let them back into the game. We finished positively and showed just how strong we are.”
Harness has started both of Pompey’s games so far this season since completing his switch from Burton.
He said: “It’s been great, but I’m still getting to know all the lads on the pitch and there are relationships being built.
“There’s a lot of depth in the squad and I’ve got to work hard to make sure I keep my place in the side.
“Now we’re ready to get out there again on Saturday and try to pick up three league points against Tranmere.”