Chelsea achieved 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 managed to stun Ange Postecoglou's struggling side with two quick goals after the break. Acheampong's 49th-minute header opened the scoring, followed by Pedro Neto doubling the lead.
Reece James added a third goal late in the game, ensuring the win and punishing a Forest side that had opportunities to score two or three goals themselves. The match ended with Chelsea having 10 men on the field after Malo Gusto was sent off late in the game.
Josh Acheampong's first senior goal sparked a second-half flurry.
In summary: Chelsea win with a second-half surge.