But they wasted several scoring chances and many promising attacking positions before substitute Jonson Clarke-Harris came on to show his teammates how to do it.
One Posh player in particular continued his good recent form, but a couple of the back up boys did themselves few favours in the 1-1 draw, a result good enough to take Grant McCann’s men through to the second round of the EFL Trophy.
RATINGS KEY: 10 – Brilliant, 9- Outstanding, 8-Very Good, 7-Good, 6-Okay, 5-Poor, 4-Very poor
5. JOE TOMLINSON
Not sure he did himself a big enough favour on a first outing since August. His poor pass helped Wycombe score and he didn't make the most of some promising attacking opportunities from left-back. His penalty in the shootout was a good one though. 5.5. Photo: Joe Dent/theposh.com
6. HECTOR KYPRIANOU
Looked stylish on the ball in central midfield at times and sat in the middle of the back three for a time without looking uncomfortable. 7. Photo: Paul Marriott
7. JEANDO FUCHS
The big downside on the night was seeing a key midfielder limp off after a pretty poor challenge. He had delivered a typically busy performance until then 6.5. Photo: Joe Dent
8. HARRISON BURROWS
He's a player revitalised by a shift into midfield and a worthy wearer of the captain's armband at the age of 20. He should have scored in the first-half, but another energetic, quality display was rewarded with the perfect cross for the goal that took Posh into the knockout stages. Even his penalty was smashed into the net in emphatic fashion 8. Photo: Joe Dent/theposh.com