Ronald Koeman has elected to keep £12m striker Shane Long on the Southampton bench as he names the same side that suffered a late defeat against Liverpool.
The decision means Long, who played the final 15 minutes at Anfield, will play behind Graziano Pelle who starts as a lone striker - Southampton were the better team for long periods against Liverpool last week and unlucky not to get at least a point.
Alan Irvine has also decided to keep the same team he selected for the draw with Sunderland.
The Baggies should have won that game, but a late lapse in concentration allowed Sunderland to grab an equlaiser.
Southampton: Forster, Clyne, Fonte, Yoshida, Bertrand, Wanyama, Schneiderlin, Ward-Prowse, S. Davis, Tadic, Pelle.
Subs: K. Davis, Gardos, Long, Taïder, Cork, Hooiveld, Isgrove.
West Bromwich: Foster, Wisdom, Dawson, Olsson, Pocognoli, Mulumbu, Gardner, Berahino, Dorrans, Brunt, Anichebe.
Subs: Myhill, McAuley, Davidson, Ideye, Sessegnon, Yacob, Baird.