A 5-0 win took the bragging rights in style with a brace from Ephron Mason-Clark and Kwame Poku doing the damage.
Our photographer David Lowndes was on hand to capture these happy faces in the crowd.
Get full reaction to the win here.
![Peterborough United fans enjoy a big win over Cambridge United.](https://www.peterboroughtoday.co.uk/webimg/b25lY21zOjFkMDY2OGI3LWI1ZjQtNDNhYS1iMTE5LTY2OTAxN2QwZTYxMDo1MWMxMjI3MC00MGQ5LTQxNTItODFkYy02ODA5NzRmODAzNWU=.jpg?crop=3:2&width=800)
1. Posh 5 Cambridge United 0
Peterborough United fans enjoy a big win over Cambridge United. Photo: David Lowndes
![Peterborough United fans enjoy a big win over Cambridge United.](https://www.peterboroughtoday.co.uk/webimg/b25lY21zOjdlNzYwOGE5LTRmMTctNDE4YS04OTkxLTY5N2U2YWIwODkxMTplMmYyNjUzYS0yZTI4LTQ5MDAtOWRjNS01MWU2ZmNmY2Y0NmE=.jpg?crop=3:2&width=800)
2. Posh 5 Cambridge United 0
Peterborough United fans enjoy a big win over Cambridge United. Photo: David Lowndes
![Peterborough United fans enjoy a big win over Cambridge United.](https://www.peterboroughtoday.co.uk/webimg/b25lY21zOmE5ZWIwODkyLTM3ZTItNDM2NC1iZTMwLTViYzI4MzAxNjE1YToyNDcwMmU0ZS0wOWVhLTQzODktOTM2Yi01YzZmYjgzMDlmYzA=.jpg?crop=3:2&width=800)
3. Posh 5 Cambridge United 0
Peterborough United fans enjoy a big win over Cambridge United. Photo: David Lowndes
![Peterborough United fans enjoy a big win over Cambridge United.](https://www.peterboroughtoday.co.uk/webimg/b25lY21zOjhhMGEwZDNiLTBiM2ItNDMyNC04ZWZiLWI2ODdmMDg4ZDk0ODplNjI0MTQ2MC0xNzI4LTRmOGQtYmJmZC05Y2VjZGE5ZmJkZjc=.jpg?crop=3:2&width=800)
4. Posh 5 Cambridge United 0
Peterborough United fans enjoy a big win over Cambridge United. Photo: David Lowndes