West Ham secured a deserved win away to League One Derby at Pride Park to book an FA Cup fifth-round trip to Manchester United.
Jarrod Bowen opened the scoring after 10 minutes when he turned home a knockdown from Tomas Soucek.
The England man then turned provider at the start of the second period when his cross deflected into the path of Michail Antonio to score his 67th goal for the club.
It was the first time David Moyes' side had completed successive victories since October, following on from last weekend's crucial Premier League success against Everton.
And it now pits Moyes against his former club in cup combat at Old Trafford for the third successive season, the Hammers winning in the EFL tournament last term after losing in the last 16 of the FA Cup the year before.
Bowen later said, "It was nice to get two against Everton and then score again tonight.
"A goal gives any player big confidence. It's really good for me but for us it's two wins on the bounce and it's all about momentum that we can use as a springboard."
On Michail Antonio scoring, he said: "Massive goal for Micky. We've been working on tap-in goals. It was at a crucial time to get a firmer hold of the game."
On facing United in the next round, Bowen added: "I only found out on the bench, I asked Dec [Declan Rice] and he said 'we've got United away'.
"It's never easy but if we want to be successful in this competition we have to beat top teams. It will be a tough game they are a top, top team but we've been there plenty of times before."
