Jonson Clarke-Harris was on target, but the Posh reserves were beaten 3-1 by Leyton Orient.
Striker Jonson Clarke-Harris was on target for the Peterborough United reserve side, but t it was visitors Leyton Orient who claimed a 3-1 victory.
Orient, managed by former Posh centre back Andy Edwards fell behind to a close-range Clarke-Harris strike in the first 10 minutes, but the O's took their chances and recorded an away win.
Teenager Jaani Gordon was a menace throughout and fired wide with his left-foot in the second half after bursting into the box.
Goalkeeper Joe Day made two excellent stops, one in each half, to keep the score at 3-1.
Craig Alcock completed 90 minutes while Peter Grant and James Sage also came through the full fixture.
Posh: Day, Alcock, Sage, Grant, Burgess (sub Butt), Lawlor, Coulson, Wood, Anderson, Gordon, Clarke-Harris.