Long Sutton Athletic’s fight for survival is over after they finished at the foot of the Peterborough & District League Division One table.
Relegation rivals Langtoft United Reserves and Kings Cliffe both had home wins.
Substitute Ashley Clipston got the only goal to condemn Long Sutton to defeat in their last game of the season.
The second-half strike was enough for Ketton to keep alive their hopes of claiming the runners-up spot.
Langtoft were 6-2 winners over league champions Coates Athletic Reserves with the goals shared between Ryan Bird, Dan Evans, Tom Glindon, Jacob Smitheringale, Tony Wooding and substitute Modesto Santaniello.
Mid-table Sutton Bridge United lost 4-3 at home to AFC Stanground who led 3-0 at the break but ended the game with four red cards.
Matt Eaton, Jake Lally and Ben Partridge were on target for Sutton Bridge.