Albion’s long unbeaten run came to an end when they suffered a 0-1 defeat to Sunderland on Saturday afternoon.
The Baggies, who played the whole second half with ten men following Brandon Thomas-Asante’s dismissal, were one-down at the break via Pierre Ekwah’s goal.
Carlos Corberán’s side give it a good go after the interval despite falling short of an equaliser, and now turn their attention to Leicester away next Saturday.
The boss made four changes from the midweek victory against Rotherham, bringing in Conor Townsend, Nathaniel Chalobah, Alex Mowatt and Grady Diangana.
The hosts had the better of the early opportunities, but Mowatt couldn’t find the target and Anthony Patterson saved efforts by Chalobah, Diangana and Darnell Furlong.
As the interval closed in, though, the tide turned. Just before the end of the half, Thomas-Asante was booked twice in quick succession to see the Baggies given their first red card since Corberán took charge 18-months ago.
And then during stoppage time Sunderland dealt another blow - Ekwah smashing home and earning them an advantage come the break.
Adam Reach and Semi Ajayi were introduced at half-time, and Jed Wallace and John Swift came on around the hour mark, with the latter quickly firing inches wide in their search for a leveller.
Fellow substitute Matt Phillips threatened twice, too, volleying one attempt off-target, and not quite connecting properly with a header.
Yet their momentum was halted - the game becoming scrappy towards the end - leaving Sunderland to see out the victory and claim all three Sky Bet Championship points.
Albion: Palmer; Furlong, Bartley (Ajayi 46), Kipre, Townsend (Phillips 67); Fellows, Chalobah (Reach 46), Mowatt, Johnston (Swift 62); Diangana (Wallace 62), Thomas-Asante.
Substitutes: Griffiths, Yokuslu, M’Vila, Weimann.
Attendance: 25,366 (1,971)