West Ham hit back to win 2-1 at West Brom and heap more pressure on Baggies boss Alan Irvine.
Kevin Nolan and James Tomkins cancelled out Craig Dawson's early opener as the hosts slipped to their fourth straight defeat.
The Hammers, though, remain fifth in the Barclays Premier League after another impressive victory.
Dawson had become the first Albion player to score in 370 minutes but the Baggies' dream start turned into a nightmare before the break.
They had recalled Chris Baird and Victor Anichebe with Sebastien Pocognoli, sidelined with a dead leg, and Youssouf Mulumbu, dropping to the bench.
Benteke is Villa hero
Christian Benteke single-handedly dragged Aston Villa out of their nine-game winless streak with his first goal in nine months securing a 1-0 victory at Crystal Palace.
Benteke side-footed the winner in a low-quality Premier League encounter at Selhurst Park to toast his return from a three-match ban for his red card against Tottenham.
The Belgian hitman was dubbed "one of the best strikers in Europe" by Villa boss Paul Lambert in midweek: the 23-year-old never had to reach that billing to decide this tie.
Palace slipped to their fifth defeat in eight games, and had only themselves to blame, wasting countless half-chances in a fruitless search for a quality final ball.