Pompey have yet to experience successive defeats this season.
So Craig MacGillivray wants to ensure it stays that way following last Saturday’s Fratton loss to Blackpool.
The Blues are on the road this weekend, visiting an Oxford side looking to escape the League One drop zone.
And with the halfway point of the campaign now firmly in the past, MacGillivray wants to make sure they hang on to top spot.
The goalkeeper said: “There are 19 games left this season and we all know that if we stay where we are after that, then we all get a crack at the Championship.
“A lot of players never have the chance to do that, so it would be a brilliant achievement if we get the job done.
"Whenever we’ve had a defeat so far this season, we’ve been able to bounce back and that’s what we have to do at Oxford."
“We know that we need win the majority of matches that remain in order to get promoted, which is our ultimate aim.
“It’s weird feeling for us when we lose a game and we did look flat against Blackpool last week – we weren’t ourselves.
“But whenever we’ve had a defeat so far this season, we’ve been able to bounce back and that’s what we have to do at Oxford.”
MacGillivray only arrived at Pompey last summer, but extended his deal with the club earlier in the week.
He explained: “I’ve really enjoyed my time here so far and jumped at the chance to sign a new contract.
“I feel that I’ve made a contribution to what we’ve done already this season and it’s nice to be rewarded for that.”