Gloucester v Bristol
Gloucester will make two changes to their side with Luke Narraway and Matthew Watkins both returning.
Narraway has recovered from a hamstring injury and will replace Alasdair Strokosch in the back row, while wing Watkins comes in for Lesley Vainikolo.
Luke Arscott returns at full-back for Bristol, while tighthead prop Darren Crompton replaces Jason Hobson after building up his match fitness.
Worcester v Newcastle
Worcester make one change to their starting line-up with scrum-half Matt Powell replacing Ryan Powell, who is sidelined by a knee injury.
Newcastle welcome back forward trio David Wilson, Geoff Parling and Matt Thompson to their starting XV.
But Ed Williamson is sidelined with a shoulder injury for the Falcons and fellow back rower Russell Winter misses out with a hamstring problem.