With three months of the calendar year remaining, Pompey have suffered just two league defeats on home soil.
But Kenny Jackett wants to see an improvement in their away form when his side visit Doncaster on Saturday.
Just one point has been collected on the road so far this term, with August’s draw at Blackpool surrounded by three defeats.
Their next opponents have already won four times at the Keepmoat Stadium, although Jackett is more concerned with how Pompey perform.
The Blues boss said: “Doncaster have made a bright start to the season and have a very capable manager in Darren Moore.
“We understand that it’s going to be a difficult game against good quality opposition and we’ve lost three away games so far.
“You can look at any of those and think ‘what if’, but we’re not happy because we had a great record last season.
"We very much want to keep improving and put a run together that can send us up the League One table."
“So we need to look at ourselves and say that we have to start improving. The opposition doesn’t really matter – it’s about our own performance.
“We’re unbeaten at home and the game last week against Bolton was a building block, a step in the right direction.
“But we very much want to keep improving and put a run together that can send us up the League One table.”
Christian Burgess and Sean Raggett produced assured displays at the back in the 1-0 victory over Wanderers.
Jackett said: “A settled back four is what every manager works towards over the course of the season and it’s a key part of being successful.
“The two guys will do everything they can to repeat that and make sure they can keep successive clean sheets if possible.”
Lee Brown could return to the team after limping off with an Achilles problem against Coventry last month.
Jackett said: “He’s trained since Monday after six weeks out, which is really good news and that can help us.
“Lee’s an experienced player and we want all of them fit and competing for places – with him and Brandon that position is covered well.”