Everton forward Richarlison continued his rich vein of form by scoring the winner at the Hawthorns on Thursday night,
Gylfi Sigurdsson whipped in a superb cross and the Brazilian directed a header past the keeper in the 65th minute.
Mbaye Diagne had an injury-time strike ruled out for offside.
The victory moved Everton into fourth place, above Chelsea and Liverpool, who met later at Anfield.
More to follow
Everton goalkeeper Jordan Pickford dives to his right to keep out Mbaye Diagne's header