The veteran striker missed Monday's 1-0 defeat at Blackpool as he is currently on loan from the Seasiders.
Boss Ian Holloway must decide whether to hand Phillips a start as he attempts to end a run of three straight defeats which has dented their promotion hopes.
Former Portsmouth forward Aruna Dindane could also be added to the squad having recently signed as a free agent, although he is short of match fitness.
Darcy Blake is fit after a knee problem but fellow defender Paddy McCarthy remains sidelined by a groin injury while midfielders Alex Nimely (hamstring) and Owen Garvan (knee) are also in the treatment room.
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- Aruna Dindane