Alan Pardew felt Charlton were worthy winners following their last-gasp 2-1 victory over Aston Villa.
Bryan Hughes headed in an injury time winner for The Addicks after Darren Bent had levelled Gareth Barry's penalty, but Pardew thought it was no less than his side deserved.
After drawing with Fulham in midweek Pardew had urged supporters at The Valley to give everything they had and he was delighted with their response.
"After the disappointment of the week our fans were brilliant today and it would have been a real injustice if we hadn't got a win," he told PremPlus.
"Regardless of the time we scored I thought we were justifiably winners today."
Charlton remain in the relegation zone but Pardew is confident the sides just above them will be starting to look anxiously over their shoulders.
"There is some indiscipline in our team in terms of trying things I wouldn't like. When you are desperate for a win you do some strange things," he said.
"The really good news for us is that this result will filter through and make other teams nervous.
"It's the spirit and the level of ability that will see them survive in this division."
Match-winner Hughes paid tribute to Pardew's influence and insisted there was now a sense of belief in the Charlton camp.
"We needed that. We're in trouble at the bottom but we're digging in," he explained.
"It just showed everyone in the team is together - we want to keep believing and keep going right through.
"We have always had belief in ourselves but have not had the rub of the green. Alan has come in and tried to give us confidence."
Bent added: "Can we stay up? Definitely. Anyone who has seen the last two games and the spirit we have shown, knows what we can do."