Leeds lost at fellow promotion candidates Swansea on Saturday but boss Simon Grayson is refusing to believe their chances of playing in the top flight have disappeared.
The Yorkshire side turned in a below-par performance when going down 3-0 at the Liberty Stadium and now trail the second-placed Swans by eight points in the table.
Grayson said: "There's 12 games to go and there's still an awful lot of points to play for.
"If people want to write us off that's up them, but we've lost two in 21 and now we're challenging the players to maintain that.
"We're capable of going on a run. Just because we've lost we can't be ruled out - if people want to so be it - but we have a great opportunity."
Leeds remain two points better off than seventh-placed Leicester and four ahead of Burnley, who have two games in hand.