A 2-2 draw with Fleetwood saw Pompey climb two places in the League One table and narrow the gap to the automatic promotion places.
But Kenny Jackett felt that some of the defending on show from the hosts prevented them celebrating a better result.
Sean Raggett nodded home to cancel out Barrie McKay’s opener and Harry Souttar then turned the ball into his own net.
He made amends by grabbing an equaliser for the in-form Cod Army, though, and Jackett questioned the discipline of his side.
The Blues boss said: “There haven’t been enough clean sheets. We all have a thirst to go forward, but that can only be 50 per cent of it.
“I don’t think we were really sound enough defensively and left ourselves too open in certain situations.
"We all have a thirst to go forward, but that can only be 50 per cent of it."
“Our full-backs were out to win and looking to run down the line before we even had the ball. If you don’t get your pass right or there’s a turnover, that makes it difficult.
“That meant it was an end-to-end contest and there were chances, as well as swings of 20-minute spells when each side looked on top.
“Fleetwood had the ascendency and looked like they were going to win, then we came back and it was like that throughout.
“We had to work harder to bring Andy Cannon into the game, although he did get on the ball more after dropping deeper alongside Tom Naylor.
“Everyone was hoping to win and we have to take a point, so it’s slightly frustrating from that point of view.”
Jackett’s options at the back will be strengthened when Pompey face Accrington at Fratton Park at the weekend.
He said: “Christian Burgess comes back from his suspension on Saturday, although I don’t think Ben Close will be available yet.”