Sophie Ingle was unlucky not to get on the scoresheet this evening after a couple of powerful strikes from the edge of the box were somehow kept out.
It was goals galore as Harder scored another two goals in quick succession to seal her first hat-trick of 2022. Kirby cut inside in the West Ham area and looked to curl one in, however Leat parried it into the path of Harder who slotted home.
The Danish international completed her hat-trick on 65 minutes when she headed in an inch-perfect ball to round off an excellent performance from the Blues.
West Ham got a consolation goal shortly before full-time, substitute Halle Houssein scored on her debut when she was alone in the box to tap home a drilled cross.
It’s a quick turnaround for Hayes’ side who are back to Women’s Super League action on Sunday when we travel to Brighton & Hove Albion, 12:30pm UK time.
West Ham United (3-4-2-1): Leat, Wyne (Houssein 81), Stringer, Flaherty, Walker, Svitkova, Longhurst (Joel 20), Parker, Filis, Fisk, Brynjarsdottir (Snerle 70)
Unused subs: Moore, Evans,
Scorers Svitkover 34, Houssein 83
Chelsea (4-1-3-2): Berger, Nouwen (Reiten 66), Bright, Ingle, Carter, Kirby (England 72), Fleming (Spence 72), Charles, Cuthbert, Harder, Andersson (Abdullina 77)
Unused subs: Musovic, Telford
Scorers Harder 25, 60, 65, Cuthbert 57