Danny Cowley wants his side to continue building momentum when they travel to Crewe this weekend.
They head to Alexandra Stadium on the back of successive League One wins over Burton and Doncaster at Fratton Park.
The hosts currently sit at the foot of the table following a midweek defeat on the road at title-chasing Wigan.
But Cowley insists that Pompey will not find life easy against an outfit who are desperately fighting for survival.
The Blues boss said: “We want to pick up from where we left off against Doncaster because that second half performance was the best we’ve played for a while.
“So we want to take they rhythm and confidence from that match and try to use it to get another positive result.
“All of the boys have trained with a real motivation this week to try to get into the team for Saturday and there’s real competition in our squad.
“Crewe have always had the ability to bring players through, but sold some good ones in the summer and that would have made it tough for David Artell.
"We want to pick up from where we left off against Doncaster because that second half performance was the best we’ve played for a while."
“Sometimes you can be a victim of your own success and he had a group who won promotion, then had a good first season in League One.
“As a consequence, there was a lot of interest in many of his youngsters and some of them were moved on.
“They’ve been on the wrong side of results recently, but if you watched them against Wigan, they were very competitive.
“You could have argued they were the better team for the first 50 minutes or so and conceded in their best moment.
“So we anticipate a tough game against a side who like to dominate the ball and ask a lot of questions of you.”
Cowley has also provided an update on midfielder Shaun Williams, who recently suffered fractured vertebrae.
He said: “Shaun went to see the specialist on Tuesday and the news was positive – both fractures are relatively stable.
“It doesn’t look like he’ll need any surgery and he’s a bit more mobile now. He can walk and do the everyday tasks you take for granted, like putting your socks on.
“He's still a long way from being available to play for us, although we have our fingers crossed that he may be before the end of the season.”