Posh have looked likes serious contenders for an automatic promotion spot all campaign, but their hopes suffered a serious blow when they lost 3-1 to in-form Blackpool on Tuesday night.
That result means they are still second in the table, but Sunderland have a crucial game in hand that would now take them above United, should they win it.
But where do the experts think Peterborough will finish, and who are they tipping for promotion to the Championship?
One set of data analysts have released their latest predictions on how the League One table will finish - and it makes for interesting reading after a busy period in the division, which has seen a number of teams drop points.
Scroll down and click through the pages as we see where their unique formula is predicting Posh to finish come the end of the 2020/21 campaign:
But where do the experts think Peterborough will finish, and who are they tipping for promotion to the Championship?