Pompey Academy were unable to make the most of their chances as they were held to a goalless draw at Peterborough.
They dominated for long periods of the Merit League One contest, with Eoin Teggart volleying the best chance of the opening half wide.
And the Blues created plenty of openings after the break, with James Whiting, Alfie Stanley and Oscar Johnson all going close to breaking the deadlock.
Academy manager Mark Kelly said: “The conditions were atrocious in the first half and we were defending against the wind.
“The best way to explain how difficult it was is that when Tom Bruce headed the ball forward, it ended up going out for a corner!
"The lads were frustrated afterwards because we know we should have won comfortably."
“So we had to be disciplined at the back, while still managing to keep the ball low and pop it around to create chances.
“We really took control in the second half and it was like the Alamo at times – we probably had eight or nine genuine scoring opportunities.
“James and Alfie both shot off target from close range, while Oscar cut inside and was denied by the keeper, who made some really good saves to keep Peterborough in it.
“I was really pleased with the overall performance and how we dominated, but we need to be ruthless in the final third and were lacking that cutting edge.
“The lads were frustrated afterwards because we know we should have won comfortably – our pace and tempo were excellent and we constantly got into dangerous areas.
“It was a similar story to our match against Oxford the previous week and we know what we need to work on.
“With several of our second year scholars out on loan, the challenge is there for the younger players to step up and take that chance.”
Pompey: Pitman; Kavanagh, Robb, Hancott, Bruce; Read, Bridgman, Whiting (Bell 74); Johnston, Stanley, Teggart