Ahmed Elmohamady is out for Villa's trip to London with a hamstring injury.

The defender was forced off in Tuesday's 1-0 win over Arsenal but Neil Taylor may return as he continues to battle his own hamstring problem.

Wesley and Tom Heaton remain out with the long-term knee injuries they suffered in January and Bjorn Engels is sidelined with an Achilles issue.

West Ham provisional squad: Fabianski, Randolph, Johnson, Diop, Ogbonna, Cresswell, Fredericks, Balbuena, Masuaku, Rice, Soucek, Noble, Lanzini, Wilshere, Snodgrass, Yarmolenko, Antonio, Fornals, Bowen, Anderson, Haller.

Aston Villa provisional squad: Reina, Nyland, Steer, Guilbert, Konsa, Mings, Hause, Taylor, Targett, Luiz, Nakamba, Grealish, McGinn, Drinkwater, Trezeguet, El Ghazi, Hourihane, Jota, Lansbury, Samatta, Vassilev, Davis.