In the back-row Kelly Brown moves to No 8 as Semo Sititi has had to head home briefly to Samoa through a family bereavement. Andy Rennick will start at blindside flanker and Andy Miller at openside flanker instead of Wayne McEntee.
Border Reivers head coach Steve Bates said: "We're very much looking forward to the Ulster game. We're very aware of their strengths and under no illusions that this is going to be a very tough battle but one we'll relish.
Reivers team:
Calum MacRae; Simon Danielli, Ben MacDougall, Garry Law, Nikki Walker; Charlie Hore, Chris Cusiter; Paul Thomson captain, Ross Ford, Bruce Douglas; Opeta Palepoi, Colin Stewart; Andy Rennick, Andy Miller, Kelly Brown.
Substitutes: Steve Scott, Geoff Cross, Mark Blair, John Dalziel, Brendan McKerchar, Scott Gray, Stuart Moffat
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