Davies has not trained since being kicked on the calf in Monday's 5-2 home defeat by Liverpool, while Zamora did not complete training on Friday because of soreness in his groin.
Impact: Zamora (right) looked lively after coming off the bench against Liverpool
Full-back Chris Baird looks like missing the last two games of the season after deciding not to contest the charge of using an abusive gesture towards referee Lee Mason in the Liverpool match.
Provisional squad: Schwarzer, Hangeland, Senderos, Hughes, Salcido, Etuhu, Davies, Murphy, Sidwell, Greening, Dempsey, Dembele, Zamora, Johnson, Stockdale, Kelly, Gudjohnsen, Kakuta, Baird, Gera.
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Explore more:People: Bobby Zamora, Simon Davies Places: Birmingham, Liverpool