Darren Ferguson said Peterborough's defending for Sheffield United's winning goal was worthy of an Under-12s side after a 2-1 loss.
Sheffield United earned their first points of the season with a 2-1 win over Peterborough thanks to a late Ben Davies strike.
Former Aston Villa trainee Bobby Olejnik has joined Scunthorpe on loan from League One rivals Peterborough.
Sky Sports understands Peterborough have made a bid for highly-rated Gateshead star Marcus Maddison.
Team news for Tuesday's League One clash between Peterborough United and Sheffield United at London Road (kick-off 7:30pm).
Darren Ferguson watched his Peterborough side defeat rivals MK Dons and then revealed he has made bids for four new players.
Kyle Vassell came off the bench to become Peterborough's hero as they saw off fierce rivals MK Dons 3-2 at London Road.
Holders Peterborough United will start the defence of the Johnstone's Paint Trophy with a home game against Leyton Orient.