Alan Irvine was pleased that a mixture of youth and experience saw the Hammers through against Hull City.
The Irons won a one-sided EFL Cup tie comfortably, dispatching their League One opponents via a 5-1 scoreline.
Robert Snodgrass scored once, while Sebastien Haller and Andriy Yarmolenko both netted braces as the club secured safe passage into round four of the competition.
There were a number of youngsters in the starting XI, including Harrison Ashby, Aji Alese, and Ben Johnson, while Mbulo Longelo Emmanuel came off the bench.
The Hmmers will play either Everton or Fleetwood Town in the next round and Irvine was thrilled with the nature of the performance.
Of course, the assistant took to the touchline to manage the club after boss David Moyes returned a positive COVID-19 test in the build-up to the fixture, along with players Josh Cullen and Issa Diop.
Speaking to the club’s official website, Irvine said: “I’m absolutely delighted.
“I think to a man they played extremely well, with three young players who ended up making debuts tonight. They all did extremely well, and the senior players helped them through and did a great job for themselves as well, so I’m absolutely thrilled with how the team played.
“I felt that right from the beginning of the game our work-rate was fantastic, our organisation was fantastic, the way that players filled in for each other was great, and I said to them in the dressing room before the game that that work gives you the platform to show what you’re capable of doing.”