It was a near-perfect afternoon for a Nottingham Forest side who appeared up against it before kick-off, having made eight changes with injuries beginning to take their toll on a squad competing on two fronts.
Head coach Vitor Pereira understandably had one eye on the second leg of the Europa League – Forest's first European semi-final for more than 40 years – with a 1-0 lead to defend at Villa Park.
Luca Netz made his first league start, while 19-year-old academy product Zach Abbott was drafted in alongside fringe players including James McAtee, Jair Cunha and Dilane Bakwa.
Despite those changes, Forest still delivered a memorable victory, with Pereira carefully managing the minutes of some regular starters. Half-time substitutions meant Igor Jesus and Nicolas Dominguez were replaced by Morgan Gibbs-White and Elliot Anderson, ensuring four likely starters for Thursday's match played only 45 minutes apiece.
It was impressive squad management from a side already without Ola Aina, Ibrahim Sangare and Murillo, and under added pressure after relegation rivals Tottenham beat European rivals Aston Villa – the latter of whom had made similar changes – on Sunday.
Just three points above the relegation zone and juggling commitments, Forest won at Stamford Bridge to extend their unbeaten run to 10 matches in all competitions.
On 42 points with three games remaining, relegation-threatened West Ham would need to take seven points from the nine still available to apply any pressure, given Forest’s superior goal difference.
The only issue is Gibbs-White is now a doubt for Thursday's pivotal game – and potentially the visit of Newcastle on Sunday – after leaving the pitch bloodied following a collision with Chelsea goalkeeper Sanchez.
Asked about Gibbs-White, Pereira said he avoided the concussion protocols, which could make his available, adding: "He has a deep cut, we will see, he is a fighter and we hope for a miracle. I said to him don't head the ball, just play."
