Leeds overcame the sin-binning of captain Kevin Sinfield to keep their Cup and League double dream alive with a 34-16 derby win over Bradford.
Fresh from their Challenge Cup semi-final triumph over Wigan, the Super League champions closed to within two points of third-placed Catalan Dragons with a sixth consecutive victory.
They were clinging to a tenuous 18-6 lead when Sinfield was shown a yellow card for tackling a Bradford player without the ball 17 minutes into the second half, but his 12 team-mates defended superbly to keep the visitors at bay in his absence.
"Kev was trying to stop a try and, in the position he was, the sin-binning was fair enough," said Leeds assistant coach James Lowes.
"How the players reacted to that defensively with 12 men was tremendous.
"We had to work hard for the win, which was to be expected against Bradford.
"After last Saturday, we were on the crest of a wave and it was quite emotional through the week. I thought it would affect us but I thought we pushed through real strong.
"All in all, we're very pleased."
Centre Kallum Watkins scored two of Leeds' six tries and sent hooker Shaun Lunt over for the 100th touchdown of his career on 48 minutes, while Danny McGuire, Sinfield and Zak Hardaker also scored tries.
Already without Carl Ablett through injury, the Rhinos lost his centre replacement Brett Delaney with a dislocated thumb six minutes before half-time which necessitated a re-shuffle, although he is expected to be fit for Wembley on August 25.
"Hopefully in the next few days we'll get a picture of how bad it is," said Lowes.
Bradford experienced an even bigger blow when in-form full-back Brett Kearney failed to re-appear for the second half after taking a heavy knock before half-time.
"He was concussed," said Bulls coach Mick Potter. "He vomited at half-time and deteriorated quickly.
"To lose one of your key players does knock you around. He was very good in the first half."
Bradford had opened the scoring with Elliott Whitehead's fourth-minute try and, although they conceded two tries in an ultimately decisive three-minute spell early in the second half, they battled to the end.
"I thought the score didn't reflect how hard the game was," said Potter.
"Unfortunately we came up with errors at crucial times and it cost us six points each time."
Potter is continuing to work unpaid after being made redundant by the administrator running the Bradford club.
The Bulls are still gripped by uncertainty amid confusion over an offer for the club from a local group of Asian businessmen, but the Australian says he will prepare the team for their next match at Warrington on Sunday week.
"I'll see what transpires this week," he said. "I'm still here so I might as well just drive into work as sit at home."
