Tom Naylor believes the Fratton faithful can help the Blues cause a huge FA Cup shock.
Premier League big-hitters Arsenal head to the south coast for an exciting fifth round tie on Monday evening.
The home support quickly snapped up every available ticket for the contest, which is being screened live on BT Sport.
Naylor knows that it will take a monumental effort to see off the Gunners, but believes an upset is possible.
Pompey’s skipper said: “It’s going to be tough – there’s no doubt about that – and we just have to make sure we give it our all on the night.
“Our ground is a fortress and the atmosphere is crazy. I’m sure it’s something that our opponents will have to adapt to.
"It’s massive for this club and it would be fantastic if we could get through to the quarter-finals of the FA Cup."
“Who knows what can happen – our form at Fratton Park is brilliant – but we just have to enjoy the occasion.
“I watched Arsenal the other night and the front four were absolutely frightening, while they have a lot of experience.
“You don’t know what sort of side they’re going to put out, but even their back-up players are internationals.
“We take every game as it comes and the league is our priority, while these cup ties are an added bonus.
“We’re into the fifth round to play Arsenal and we’re also going to Wembley for a final – just as we did last season.
“It’s massive for this club and it would be fantastic if we could get through to the quarter-finals of the FA Cup.”