The Forest Under-23 side took on their Cardiff City counterparts, and first-team manager Karanka attended the match.
Toby Edser and Virgil Gomis scored the goals for the Reds in their comfortable 2-0 win.
Encouraging for Nottingham Forest fans
Karanka's presence at the Under-23 game on Monday evening suggests that the Forest manager is keeping tabs on the youngsters at the club.
Although Forest have a strong squad who are capable of finishing in the top six of the Championship this season, the former Middlesbrough manager may need players from the Under-23 side in the coming months.
It must be very encouraging for Forest fans and the youth-team players that Karanka was at the Under-23 side’s game against their Cardiff City counterparts at the City Ground on Monday evening.