Doncaster welcome Newcastle Thunder on Sunday, with the winner going to within one game of promotion to the Championship.
It is the second time in three weeks the two sides will meet, with the Dons putting in an impressive display at Kingston Park to win 22-8.
This time, the Thunder will be hoping to enact some revenge on Doncaster for beating them on their own patch.
The winners will travel to Oldham next week for the League One Grand Final, with the winners joining Whitehaven in the Championship in 2020.
The match kicks off at 12pm.