Manager Russell Slade says goalkeeper Simon Moore is ready to step back into the firing line as Cardiff City look to end their Championship "blip" against Charlton.
Moore, 25, is set to replace captain David Marshall, who is suspended after Saturday's red card at Rotherham.
Slade says that dismissal is a "warning" to Marshall, and he is confident Moore can fill the void.
"He [Moore] is really, really good, so he will be ready," said Slade.
"From a physical point of view and a mental point of view... his work ethic is extraordinary."
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Slade is set to make changes as Cardiff aim to end a two-match losing run, with defender Lee Peltier doubtful and striker Kenwyne Jones and winger Anthony Pilkington vying to start.
The Bluebirds will certainly be without Marshall, who was sent off for a kick on Rotherham striker Matt Derbyshire. His three-match suspension was reduced to two games on appeal.
Earlier this term, the Scotland international served a three-match ban for a dismissal in last season's final game away to Nottingham Forest.
Slade rejected any notion Marshall might have been affected by the club rejecting offers from Premier League side West Bromwich Albion for his services in the summer transfer window.
"In my opinion I don't think it did [play a part]...but it is a warning that he needs to be careful," said Slade.
"I can see fans putting two and two together and seeing that is one disgruntled goalkeeper. But that is not the case at all.
"He is very professional, he is a good man and he is a good leader of his players at the football club."
After a six-game unbeaten start to the Championship campaign, Cardiff have suffered consecutive defeats at home to Hull City and away to Rotherham.
Slade added: "We need to get the momentum back as quickly as possible. I would like to think it is a bit of a blip."