The prospect of a second trip to Wembley in 12 months is an enticing one, but, unusually, Posh also find themselves in the thick of a relegation fight and they have a crunch game at home to fellow strugglers Shrewsbury Town on Saturday.
The PT is in no doubt which game is more important so here is our Posh team for the semi-final against a powerful side who remain favourites for promotion to the Championship at the end of this season.
Kwame Poku, Gustav Lindgren and Jadel Katongo are not expected to return from injury until the weekend, while Sam Hughes and Tayo Edun are cup-tied, and Carl Johnston is injured and cup-tied! Ricky-Jade Jones could be a doubt with a back problem.
Our team has been picked in a 4-2-3-1 formation...
5. GEORGE NEVETT
Sam Hughes is also cup-tied so another chance for the young left-sided centre-back to shine. Photo: David Lowndes
6. RYAN DE HAVILLAND
The tidy midfielder surprisingly didn't even make the matchday squad at Huddersfield. I see no point in risking Archie Collins or Hector Kyprianou in this game and I'm selecting De Havilland ahead of Donay O'Brien-Brady. Photo: David Lowndes
7. MO SUSOHO
The on-loan Manchester City midfielder could do with some minutes just in case Collins or Kyprianou break down in the future as I suspect he is next in line now. His passing was crisp and intelligent when used as a late substitute at Huddersfield. Photo: David Lowndes
8. CHRIS CONN-CLARKE
This natural number 10 should have a point to prove after being left out in favour of a striker at the weekend. Conn-Clarke could have scored twice at Wrexham in the League One fixture last month. It's time to show why Posh were so keen to sign him in the summer. Photo: Joe Dent