The result leaves second-placed Cardiff one point ahead of Fulham with two games left, while Derby have moved back up to the sixth and final playoff spot, two points above Millwall.
The top two sides receive automatic promotion to the Premier League, with the next four teams battling it out in the playoffs for one more spot.
Cardiff will have to win at Hull City on Saturday and against visiting Reading to clinch promotion if Fulham win at home to relegated Sunderland on Friday and at Birmingham City.
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Wolverhampton Wanderers, who have already won automatic promotion as champions, have 98 points ahead of Cardiff (86), Fulham (85), Aston Villa (83), Middlesbrough (72) and Derby (71), who visit Villa on Saturday when 'Boro host Millwall.
(Writing by Ken Ferris; Editing by Peter Rutherford)
