Pompey are sitting at the League One summit after negotiating the opening 12 games without defeat.
But Nathan Thompson knows that will become a mere footnote in history if they fail to finish in the promotion places at the end of the season.
Gillingham are the next opponents on Saturday, with the visitors from Kent currently sitting inside the drop zone.
And while Thompson is certainly not getting carried away, he admits confidence is high in the Blues camp.
The right-back said: “Without trying to sound too clichéd, the lads are just taking each game as it comes.
“There’s been real momentum forming since the first match of the season and when you’ve built up this unbeaten run, you’re desperate not to lose it.
“The important thing is to convert this opening into something that really matters at the end of the season."
“It’s fantastic that we’re starting to make a little bit of history, but it’s a long campaign and nobody remembers that if you slip down the table after 20 games.
“The important thing is to convert this opening into something that really matters at the end of the season.
“But at the moment we do have that psychological advantage and fancy ourselves against anyone in this league.
“This club needs to be at the top of the division and fighting for promotion, and I think we’re starting to realise some of the potential in the dressing room.
“We’ve got a confident group and we want to get back to winning ways at Fratton Park against Gillingham. We need to find a way to break them down.”
Thompson recovered from a knee problem earlier in the campaign, but had to earn his return to the side.
He said: “It’s always difficult when you’re out injured, but when I was back we were winning games and you can’t complain about not being in the team.
“The manager’s brought in players to give us more strength in depth and that’s what you need if you want to have a title push.”