Brandon Haunstrup was frustrated at losing his place in the Pompey side at Blackpool.
But the academy graduate accepts that his spot on the left wing was only going to be a temporary measure.
He performed that role in the opening day victory over Luton, with Ronan Curtis moved there last Saturday.
Now Haunstrup will hope to have an opportunity to impress in a more familiar location when the Blues host AFC Wimbledon in the Carabao Cup this evening.
He said: “I was a bit disappointed not to retain my place in the team following the opening game of the season.
“But I understand that I was a makeshift left-sided midfielder and the manager needed me to do a job on the day.
"You want to do well whenever you get a chance in the team and look to impress the gaffer."
“It was a good experience for me to play in a different position, although my ideal role is obviously as a left-back.
“We did well to get the result against Luton and it’s difficult for anyone to then come out of the team, but I realise that we wanted to be a bit more attacking at Blackpool.
“You want to do well whenever you get a chance in the team and look to impress the gaffer, as well as get a positive result.”
Trying to win promotion from League One will be Pompey’s main aim this season, but Haunstrup is still looking for a cup run.
He said: “Our confidence is high at the moment and it’s always positive when you’re picking up good results.
“We’re winning matches and of course we want that to continue in the cup – hopefully we can go through to the next round.
“We’ve looked at the videos of AFC Wimbledon and know what to expect from them, although a lot of the lads would rather focus on their own game than the opposition.
“Every match that we go into, we’re looking to win. That’s in any competition, so we’ll be doing our best to progress.”