Pompey broke a duck last weekend by beating MK Dons to secure successive league wins for the first time this season.
But Kenny Jackett will be out to avoid an unwelcome first when he takes his troops to Blackburn on Saturday.
They have yet to lose back-to-back League One fixtures this term, but suffered a midweek defeat at Doncaster.
And Jackett hopes that Pompey can bounce back against a side who are currently only above them on goal difference.
The Blues boss said: “They’re a club who came out of the Championship, but will have aspirations of going straight back up.
“Blackburn are used to being in the higher echelons and haven't been at this level much in the past, but they are where they are.
"We don’t want a second successive defeat and we always aim to win football matches."
“It’s a great place for us to go and it’s a game that we should all look forward to if we want to climb the divisions.
“Ewood Park is a good ground with a decent atmosphere and after a frustrating evening at Doncaster, we’re doubly determined to return to winning ways.
“They’ve got a strong squad of players, but we don’t want a second successive defeat and we always aim to win football matches.”
Conor Chaplin brought up a century of Pompey games when he came off the bench at Doncaster and Jackett believes he has a bright future.
He said: “Conor’s not 21 until February, so it’s a good achievement for him to have made 100 appearances already.
“He’s been an impact sub in a lot of those games – and has been extremely effective in that role. He was on Tuesday night.
“We want him to be more than that and to be a regular starter, but that should be a realistic target for him.”
Pompey could have their skipper and top scorer back to face Blackburn after he recovered from a knee operation.
Jackett said: “Brett Pitman trained and said he was okay, so we’ll have to see whether he’s ready to play on Saturday.”