Charlton midfielder Bradley Pritchard has warned Cardiff that his side are out to spoil their promotion party.
The Welshman need only one point to seal their place in the Premier League.
But Charlton are looking to close the half dozen points gap between themselves and the Top 6 as they look to snatch a shock play-off spot.
The Zimbabwean, 27, said: “We’re looking to go there and upset a few people.
“They’re on a good run and are certainly looking at getting promotion, so if we can spoil their day in some way, we’ll be happy.
“I think anybody in and around us will be saying the same thing about the play-offs; if we can put a few results together, then who knows?”