Denaby United claimed a last-gasp winner over Frecheville for a 1-0 win which has propelled them into fifth spot.
After a bright start to proceedings, United struggled to find their breakthrough with Ainslie Finney and Steve Ellor foiled early on.
Denaby then thought they had taken the lead on 10 minutes when Ellor again got clear from an Ashley Cantrill pass and put the ball away with a rasping shot - however, the effort was disallowed for offside.
Frecheville had their first effort when Josh Barringham got his head to a cross but his header sailed wide.
United ‘keeper Ben Priestley later spilled a catch whilst under pressure and Tony Mullen cleared the danger with Denaby aghast that no free-kick was awarded for a foul on the shot-stopper.
Barringham continued to carry the threat for the visitors - and got a shot in from a tight angle which Reds ‘keeper Priestley got firmly behind.
The final chance of the half came when Jamie Buxton got in a challenging cross for Frecheville but United managed to clear the danger.
Denaby started the second period as they had started the first, as Finney went on a surging run before being brought down. However, he then put the resulting free-kick over the bar.
Cantrill continued to create for United down the right hand-side, but the home outfit lacked a cutting edge in possession.
Ben Parker then raced clear for United and - with only the ‘keeper to beat - he saw his shot hit the shot-stopper’s legs and rebounded to safety.
Just as a draw looked likely, Jack Whittaker was introduced from the bench and showed a case for inclusion from the start of Denaby’s next game with a couple of forceful forays before producing the pass for a dramatic winner.
With the match heading into stoppage time, Whittaker took possession and surged down the left, beating his marker before passing the ball across the area where striker Ellor was expertly-placed to stroke the ball home - giving the Reds a vital victory in Division Two.