It was a debut full of promise, even if it failed to spare Pompey from defeat.
Omar Bogle came off the bench to score on his first appearance in a dramatic top-of-the-table clash against Luton.
The hosts had dominated the first half at a snowy Kenilworth Road, but Ronan Curtis struck just after the restart to cancel out James Collins’ opener
A penalty was then converted by Collins, but Bogle was a constant nuisance and managed to find a second equaliser.
George Moncur fired home a controversial free-kick late on to seal victory for the Hatters, but Kenny Jackett was pleased with his new signing.
The Blues boss said: “Omar gave us some presence up front, which is something we have lacked lately.
“It was a good debut – not just because he scored, but also the forward momentum he gave us and how he brought other people into play.
“We probably created more in that second half than we have in the two-and-a-half games before that.
“He’s come off the bench and it’s 45 minutes for him to build on his fitness. He showed he can get on the ball and has a lot to offer.
"We probably created more in that second half than we have in the two-and-a-half games before that."
“Omar made a big difference in the second half and really gave us a focal point for our attacks. It was encouraging.
“We fought back well and had the lion’s share of the play after the break, but ultimately it was Luton’s night.
“There’s a long way to go and we’re disappointed to lose. We can’t brush this one under the carpet, but we’re still in the hunt and we have to look forward positively.”
The travelling fans were frustrated with referee Simon Hooper for awarding Luton the penalty and free-kick that they scored from.
Jackett said: “We just didn’t get the rub of the green with the decisions throughout the game. It happens sometimes – particularly when you’re the away side.
“We’ve conceded two goals in the second half from set-pieces. My impression was that it was a penalty, although I felt we should have had one as well.
“I didn’t think it was a free-kick at the end and Moncur’s struck it very well inside the post, which was decisive.”