Chelsea U21 1 Sunderland U21 0
The match was played at the London club's training ground and a goal from Islam Feruz just before half-time won the match.
The Black Cats had an opportunity to snatch a point when they were awarded a penalty midway through the second half, but Jordan Laidler saw his spot-kick saved.
SUNDERLAND: Wilson, Marrs, Ferguson, Harrison, McNamee, Mitchell, Laidler, Gorrin, Noble, Mandron (Smith, 85), Honeyman (Thomas, 77).
Subs Not Used: Dixon, Joyce, T Robson.