The reverse in midweek came despite a late fightback and King said afterwards: "On Saturday I’m preaching to them that if it’s there, it’s got to come out and come out from the start.
“The last 20 minutes against Oldham has shown me there’s something there.
“The optimism doesn’t falter but we have to get a result on Saturday. If it’s a lucky result I don’t give a damn, we have to get a result.
“If they start the game like they finished it then I don’t hold any fears about Nottingham Forest."