Aviva Premiership Venue: Sixways Date: Friday, 5 January Kick-off: 19:45 GMTCoverage: Live commentary on BBC local radio and on the BBC Sport website
Worcester lock Will Spencer returns in the only change to the Warriors side which earned a bonus point in a defeat by Saracens in their previous game.
Darren Barry is named among the replacements after starting at Sarries.
Bath make four changes from the side beaten by Wasps, with Ben Tapuai replacing James Wilson at wing and Chris Cook returning at scrum-half.
James Phillips and Elliott Stooke replace Luke Chateris and Charlie Ewels among the forwards.
Warriors director of rugby Alan Solomons told BBC Hereford & Worcester:
“We stuck to it against Saracens last week and I was really pleased with the hard work we put in to get a try bonus point.
“There’s a long way to go yet this season, but we know we’re going to have to be at our best on Friday.
“There’s been a reasonable amount of consistency about us over the last two or three months and we’ll look to continue in that vein.”
Warriors: Pennell; Heem, Willison, Mills, Adams; Olver, Hougaard; Waller, Singleton, Milasinovich, O’Callaghan (capt), Spencer, Denton, Lewis, Van Velze.
Replacements: Haupt, Bower, Kerrod, Phillips, Faosiliva, Dowsett, Shillcock, Humphreys.
Bath: Watson; Jack Wilson, Joseph, Tapuai, Brew; Priestland, Cook; Obano, Dunn, Thomas, Phillips, Stooke, Garvey (capt.), Grant, Mercer.
Replacements: Van Vuuren, Noguera, Lahiff, Douglas, Bayliss, Fotuali’i, Burns, James Wilson.
Referee: JP Doyle.