The England international missed last weekend's match at Manchester City after going over on his ankle in training just days after making his long-awaited comeback from a broken leg.
On the up: Zamora could start for the Cottagers
Midfielder Steven Sidwell continues to miss out with knee ligament trouble, while long-term absentee Philippe Senderos needs more work after feeling tightness in his hamstrings.
Provisional squad: Schwarzer, Stockdale, Pantsil, Hangeland, Hughes, Baird, Briggs, Etuhu, Davies, Murphy, Duff, Dempsey, Gudjohnsen, Kakuta, Gera, Dembele, Salcido, Greening, Johnson, Zamora, Halliche.
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Explore more:People: Philippe Senderos, Bobby Zamora Places: United Kingdom