Ole Gunnar Solskjaer's side sit second-bottom of the top flight, three points adrift of safety, following a crushing 4-0 home defeat to Hull City on Saturday and have won just five league games all season.
Since the Norwegian's appointment in January, the Bluebirds have recorded just one Premier League victory, picking up four points from a possible 24, but the centre-back remains upbeat.
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"It is now about keeping it tight and keeping as many clean sheets as possible. Our job is to show the character and spirit to bounce back.
"We will show our fight, our passion and go into every game believing in ourselves. The minute you stop doing that you are in danger of drifting away.
"With the manager behind us and the players we have there is no doubt in my mind we can still stay up. I felt confident from the start of this season we would stay in the Premier League and I feel the same way now.
"There are 11 games to go and Cardiff's fate is very much in our own hands. There is plenty of time to secure our future at the top level for next season. There's no need to start panicking and it wouldn't help if that happened.
"We've been through a transitional period since the turn of the year and the fans have been patient. I'd ask them to stick with us. It's clear, though, we have to start picking up points."