Cardiff City sent a young team to Nottingham Forest for a Professional Under-23 Development League fixture at the City Ground.
Midfield player Lloyd Humphries returned after recovering from injury, while Tyrone Duffus was also in the Bluebirds squad.
Under-18 players Ben Margetson and Jac Davies were both included in the starting line-up.
Cardiff finished with 10 players after defender Ciaron Brown was forced off by injury after they had used all three substitutes.
Forest climbed to third in the table thanks to their 2-0 win against Cardiff. Second-half strikes by Toby Edser (61 mins) and Virgil Gomis (68) secured the victory for the home team, who are unbeaten in four matches.
Edser capitalised on a defensive error to finish clinically from 20 yards, while Gomis made it two with a low shot.
The next under-23 match for Cardiff is against Coventry City away on Friday (1pm), while they entertain Millwall at Cardiff International Sports Arena on Monday, September 24 (2pm).
Craig Bellamy’s Bluebirds’ under-18 team travel to play Bristol City on Saturday (September 15), while they entertain Crystal Palace at Cardiff ISA on Saturday, September 22 (11am).
Coach Bellamy and his players then face Watford at the same venue on Saturday, September 29 (11am).
Nottingham Forest: Henderson, Richardson, Preston, Coveney, Ahmedhodzic, Gabriel (Stewart 46), Taylor (Gallacher 46), Fornah, Gomis, Edser (capt), Sodeinde (Mergaritis 67). Subs not used: Wright, J. Hefele
Cardiff City: Warren Burwood, Ben Margetson, Ciaron Brown, Jack Bodenham, Jac Davies (Lloyd Humphries 53), Jamie Vedle, Paul McKay (Tyrone Duffus 64), Laurence Wootton, Ryan Pryce, Daniel Martin, Ibrahim Meite (Henry Smith 64). Sub not used: Matthew Hall (gk).