Ulster have made three changes for the visit of Guinness Pro 12 table-toppers Glasgow Warriors.

Ian Humphreys will replace Paddy Jackson who is unavailable, while Andrew Warwick and Nick Williams are named in the pack in place of Ruaidhri Murphy and  Roger Wilson.

Ulster, who are third in the table, will be facing a side which has won all five of their league games so far.

Starting XV: Louis Ludik, Andrew Trimble, Jared Payne, Stuart McCloskey, Tommy Bowe; Ian Humphreys, Paul Marshall; Andrew Warwick, Rory Best (Captain), Wiehahn Herbst, Alan O’Connor, Franco van der Merwe, Robbie Diack, Chris Henry, Nick Williams

Replacements: Rob Herring, Callum Black, Bronson Ross, Lewis Stevenson, Roger Wilson, Michael Heaney, Stuart Olding, Craig Gilroy.