Victory for Ruston Sports in their final league game of the season at Cleethorpes on Saturday will secure third place in the Sills and Betteridge Lincolnshire League.
The Lincoln-based Sports will need all three points to steal third spot from Gainsborough, who have a superior goal difference.
Meanwhile fifth placed Boston United Reserves will be looking to finish off with a win when they entertain Horncastle Town at York Street.
Fulstow-based CGB Humbertherm host Sleaford Town Reserves knowing that they have to win their final two games by an aggregate of eight goals to pinch sixth spot from Skegness United.
Fixtures- Boston United Reserves v Horncastle Town; CGB Humbertherm v Sleaford Town Reserves; Cleethorpes Town Reserves v Ruston Sports.