Chelsea earned a convincing victory at the City Ground, thanks to a second-half surge sparked by Josh Acheampong's first senior goal.
The Blues were outplayed in the first half but stunned Ange Postecoglou's struggling side with two quick goals after the break. Acheampong's 49th-minute header opened the scoring, before Pedro Neto doubled the lead.
Reece James added a third goal late on to secure the points and punish a Forest side that could have scored two or three goals themselves. Chelsea ended the match with 10 men after Malo Gusto was sent off late on.
Author's summary: Chelsea win at Forest with second-half goals.