West Brom's final Premier League game at The Hawthorns for at least a year will be at home to West Ham.
The Baggies were set to hold Liverpool to a 1-1 draw on Sunday until that now-famous stoppage-time header from goalkeeper Allison gave the visitors all three points.
Now, they host another team chasing European football next season.
While West Ham cannot quality for the Champions League, they are still in the hunt for a place in the Europa League.
For Sam Allardyce's side, the remaining games of the season are all about pride and the chance to climb above Fulham - also condemned to Championship football next season - to finish 18th in the table. Going into the penultimate round of fixtures, just one side separates the two teams.
What time is West Brom vs West Ham
The 'West' derby kicks off at 8.15pm on Wednesday.
One other match - Burnley vs Liverpool - also gets underway at that time.
West Brom vs West Ham TV channel
Sky Sports has the rights to show the game, which will be on its Premier League channel only.
Burnley vs Liverpool is on Sky Sports Main Event.
Albion have no new injury concerns to worry about, but Allardyce could look to utilise his squad as the club prepare for a drop into the Championship. Grady Diangana could start once again for the Baggies after coming in for the Liverpool clash, as could Hal Robson-Kanu.
West Ham have been buoyed by the recent return of Declan Rice. Manuel Lanzini and Arthur Masuaku are the only real injury worries for the Hammers.
West Brom's final game of the season will take them to Leeds.
Kick-off on Sunday is at 4pm.