The Posh Under 21s were beaten 4-3 by Crewe Alexandra in Professional Development League action on Monday.
The Peterborough United Under 21s twice led but were ultimately beaten by Crewe Alexandra at the idverde Training Ground on Monday afternoon as the Railwaymen took all three points thanks to an improved second half display.
The game was littered with opportunities, particularly in the first half and Posh opened the scoring inside the opening two minutes as Pemi ADEROJU guided a shot into the back of the net after Hisham Chiha did well to close down the Crewe goalkeeper.
Midfielder Will Van Lier curled a free-kick over the crossbar from 25-yards on nine minutes with Chiha seeing a powerful drive deflect over the top.
Sant headed over from a free-kick on 16 minutes while at the other end, Aderoju headed over after good work from Rueben Marshall.
Donay O'Brien-Brady saw a low shot kept out by the keeper with Marshall firing the rebound wide before the visitors got themselves level as PARRY fired past Fynn Talley from close-range.
Less than 60 seconds later, Posh were back in front as O'Brien-Brady saw his poked effort saved by the keeper only for the ball to rebound back into the net via the Trialist goalkeeper.
Aderoki smacked the crossbar from close-range after good work from Marshall on 40 minutes before Van Lier cleared the crossbar with another free-kick.
O'Brien-Brady was denied by a fine stop by the Crewe goalkeeper on 49 minutes, but two minutes later, the visitors were level as the TRIALIST tapped home from close-range.
Moments later, Crewe were in front as PARRY found the bottom corner afte some sloppy Posh defending.
On 66 minutes, Posh were back level and it was substitute Tyler WINTERS with it, the striker sliding in to force the ball home after excellent work from Marshall down the right.
Harry Thomas headed wide on 68 minutes, but it was the visitors who got the next and decisive goal in the game as DANCEY stabbed home from close-range after Talley kept out the initial effort.
Emmanuel Fernandez, Winters and Marshall all went close to forcing an equaliser, but the Railwaymen held on for the points.
Posh: Talley, Daley-Campbell, Bodnar, Thomas, Fernandez, Van Lier, O'Brien-Brady, Chiha, Aderoju (sub Winters 55min), Trialist A (sub Lamb 82min). Unused subs: West, Toynton, Marcon.