Cardiff will be hoping to spoil those plans, but come into the contest off the back of a 2-1 defeat to Brentford that ended a three-game winning streak and face a difficult test against the league leaders.
It is a seventh consecutive victory for Marcelo Bielsa's men, who also take their unbeaten run to 10 games as they open up an 11-point gap between themselves and the playoff places.
The Whites have done so with a superb defensive record, conceding just 10 goals in 21 games so far and keeping four clean sheets in succession.
At the other end, they have been far from blunt, netting 32 times in the Championship this campaign - a tally that is behind only West Brom, Bristol City, Fulham and Preston North End.
Cardiff had been expected to be battling it out for an automatic promotion spot with Saturday's opponents, but have stuttered since dropping back into the second tier.
The Bluebirds sit ninth, three points off the playoff places, and saw their four-game unbeaten run - including three consecutive wins - ended in their last outing at Brentford.
However, Cardiff would not be opposed to adding to that tally when they visit Elland Road, given Leeds' stunning recent form that has swept aside all before them.
Leeds United Championship form: WWWWWW
Cardiff City Championship form: LDWWWL
Leeds boss Bielsa is without a handful of players but could be boosted by the return of a key man to the frame.
The impressive young defender, on loan from Brighton & Hove Albion, could be joined by club captain Liam Cooper, who is close to making a return from injury.
Cardiff head coach Harris has a number of doubts in the form of Leandro Bacuna, Robert Glatzel, Sol Bamba, Omar Bogle and Joe Ralls, most of whom have been in training and will be assessed ahead of the game.
Leeds United possible starting lineup:
Casilla; Ayling, White, Berardi, Dallas; Phillips; Costa, Hernandez, Klich, Harrison; Bamford
Cardiff City possible starting lineup:
Etheridge; Peltier, Flint, Nelson, Bennett; Paterson, Pack; Mendez-Laing, Tomlin, Hoilett; Ward
We say: Leeds United 1-0 Cardiff City
Leeds' defensive record this season has been outstanding and they have been in irresistible form. Bielsa's side could record yet another clean sheet in yet another victory as they march towards automatic promotion.