The West Yorkshire outfit maintained their strong start to the season with a comfortable 2-0 victory over Forest away from home at the City Ground in the Championship.
Kemar Roofe put the Whites in the lead in the 24th minute, and Ezgjan Alioski wrapped up the points for the visiting team three minutes from full time.
The performance was Leeds against the Reds was very encouraging and underlined their playoff credentials.
Leeds head coach Christiansen has taken to Twitter to express his delight at the win for his team, summing up his emotions in only two words - “just proud”.
Leeds are third in the Championship table at the moment with 11 points from five matches.