At half-time of their televised clash with Plymouth, most watching fans of the visiting club would have welcomed a draw.
Pompey were a goal down, well below their best and facing a side who had yet to be beaten in League One on their own patch.
But on came Jack Whatmough and Ellis Harrison and it was a much improved display after the break, with John Marquis’ penalty and a Tom Naylor strike turning the contest on its head.
So Kenny Jackett was left frustrated to only collect a point after his men allowed Jerome Opoku to net a sloppy Argyle leveller.
The Blues boss said: “Plymouth were better than us in the first half and deserved their lead, while we looked slightly disjointed.
“The changes helped us and we built some momentum. We got back into the game well and looked a real threat.
“We’re frustrated with the second goal we conceded, which seemed to go into the net in slow motion.
"In the end – when you look at the game as a whole – we’ll take the draw and move on."
“It was a rare mistake from our keeper, who had made some really good saves for us earlier in the match.
“Ryan Williams felt his groin slightly and he wasn’t quite 100 per cent, but we were short on wide players with Curtis and Jacobs out.
“Andy Cannon really brought his best game when he moved centrally in the second half, showing us composure and very good passing on the ball.
“Overall it was competitive and in the end – when you look at the game as a whole – we’ll take the draw and move on.
“It was disappointing that we couldn’t go on to win and we certainly looked capable of that, but Plymouth are a strong side and never gave up.”
Whatmough was making his first appearance in November after the centre-back had recovered from a hamstring injury.
Jackett said: “There are no problems with him and we’re obviously delighted to see him back because he’s a strong option for us.”