A 21-year-old man has died after allegedly being punched in the face outside a home in Sydney’s west, early on Saturday morning.

The man fell to the ground, lost consciousness and was taken to hospital, where he died on Sunday night.

Police allege the man was punched by another man, also 21, after they had been at a party together at Minchinbury.

Police arrested the man at the scene and charged him with causing grievous bodily harm with intent, common assault and affray.

He has been refused bail and will face court next week.