Pompey Academy stretched their unbeaten run to four games, but had to battle from behind to secure a point against Stevenage at Furze Lane.
The visitors took the lead midway through the first half, as Jack Moriaty collected a pass from Bunja Conteh and calmly slotted the ball home.
There should have been a chance to level for the Blues when Oscar Johnston got pulled back in the box, but the referee waved away the penalty appeals.
An equaliser did arrived after the break, however, as Josh Flint nodded the ball down for Johnston to tuck away.
Academy manager Mark Kelly said: “We were up against a big, physical side and they gave us a few problems in the first half.
“We spoke to the boys about not getting drawn into those battles and to instead keep moving the ball around.
"It was disappointing that we couldn’t go on and win the game comfortably because we created plenty of decent openings."
“They took that on board and we were excellent after the interval, playing some really nice stuff and getting in behind our opponents.
“We looked comfortable and in control and, after not getting a definite penalty earlier, Oscar scored the equaliser.
“It was disappointing that we couldn’t go on and win the game comfortably because we created plenty of decent openings.
“I was happy with the overall performance and it was nice to get some of our under-16s involved in the action.”
Pompey: Pitman; Kavanagh (Brook 80), Bruce, Mnoga, Hancott; Robb (Lee 61), Whiting; Johnston, Bridgman, Teggart (Flint 61); Stanley