Danny Cowley has called for a united Pompey when Burton visit for a League One contest this evening.
He was impressed with the backing provided by more than 1,700 travelling fans in a harsh defeat at Oxford on Saturday.
And Cowley hopes a similar display of passion from the stands can help provide the spark for a first league win of 2022.
But he knows that his side have to earn that support by producing a display to motivate the fans.
The Blues boss said: “We were very disappointed to come away with nothing on Saturday, but I was proud of their efforts and fight.
“I was also proud of our supporters and the way we stuck together as a football club in a difficult moment.
“We’re going to need all of those qualities again on Tuesday and it’s a time when we have stand as one.
"We have to give them something to get behind. If we can do that, then we know they’ll be right there with us."
“I’m sure that if we keep doing that then we’ll find a way through this because there was a benchmark of the grit and determination that’s required.
“We made some changes in January and the group has naturally evolved, but we saw a connection with the fans at Oxford.
“Now we need to build on that and we totally understand that it has to start with our performance on the pitch.
“We have to give them something to get behind. If we can do that, then we know they’ll be right there with us.”
Burton are sitting one place above Pompey in 12th spot and were beaten at home by Sheffield Wednesday at the weekend.
Cowley said: “They’re a tough team and very physical. They love to defend early and get pressure on the ball.
“In possession they like to get into the final third quickly and will ask you a lot of questions with their direct play.
“They will work hard to gain territory and have got some good routines from corners and free-kicks that we’ll need to be aware of. We know they’ll bring a threat.”