Duncan has picked three returning Springboks - flank Teboho "Oupa" Mohoje, lock Lood de Jager and prop Trevor Nyakane - in his starting team.
The trio was part of the Springboks' Rugby Championship campaign but because they are not contracted Boks, they are allowed to play Currie Cup.
Contracted Springboks who the Cheetahs were not allowed to pick are fullback Willie le Roux, wing Cornal Hendricks, prop Coenie Oosthuizen and hooker Adriaan Strauss.
For the Cheetahs to make the semi-finals, they must beat the Lions and hope the Blue Bulls lose at home to Griquas.
Teams:
Golden Lions:
TBA
Free State Cheetahs:
15 Clayton Blommetjies, 14 AJ Coertzen, 13 JP du Plessis, 12 Joubert Engelbrecht, 11 Raymond Rhule, 10 Willie du Plessis, 9 Sarel Pretorius, 8 Lappies Labuschagne, 7 Teboho Mohoje, 6 Tienie Burger, 5 Francois Uys, 4 Lood de Jager, 3 Trevor Nyakane, 2 Torsten van Jaarseveld (captain), 1 Caylib Oosthuizen
Substitutes: 16 Hercu Liebenberg, 17 George Marich, 18 Henco Venter, 19 Neil Claassen, 20 Shaun Venter, 21 Pieter-Steyn de Wet, 22 Maphutha Dolo