Ben Foster could return for the first time in 10 months after fully recovering from a serious knee problem.
The goalkeeper played 45 minutes in a 4-3 win over Kidderminster under-21s this week and may start against Bristol City for the first time since last March following a cruciate knee ligament injury.
Salomon Rondon and James McClean are available for the FA Cup tie after suspension and Saido Berahino will be included in the squad, despite the on-going uncertainty over his future, but Jonas Olsson remains a doubt with a hamstring injury with Victor Anichebe is definitely sidelined with his own hamstring issue.
Provisional squad: Myhill, Foster, Lindegaard, Gamboa, Pocognoli, Chester, Evans, McAuley, Dawson, Olsson, Brunt, Gardner, Yacob, Fletcher, McManaman, Morrison, Sessegnon, McClean, Lambert, Rondon, Berahino.
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