Upwell did major damage to Littleport’s Cambs League 5C title aspirations, winning 3-2 away from home.
Littleport, who hadn’t lost in their last 10 and recently won a county cup, were behind to Jonny Allen and Jack Watson within the first 30 minutes.
Although Littleport pulled one back Watson ensured Upwell led 3-1 at the break.
In the second half Upwell defended valiantly and goalkeeper Luke Fage pulled off a fantastic reaction save.
Manager Karl Schultz said: “It was a fantastic performance from the lads. They all knew their jobs today and stuck to them, working exceptionally hard for each other. Hopefully we can see the season out in style next week at home to Isleham!”