Grant McCann is out to inspire another immediate Championship return after Peterborough suffered the drop on what the manager called a 'sad day'.
This was one of those surreal footballing occasions where Peterborough could be relegated with a win and Forest able to seal a play-off spot even if beaten.
As it turned out, neither of those scenarios became reality with Forest taking victory and keeping their dream of promotion to the Premier League alive.
Sam Surridge headed the only goal on the stroke of half-time from Brennan Johnson's cross, capping a terrific counter-attack started by Philip Zinckernagel.