Luciano Becchio scored twice as Leeds came from behind to beat Middlesbrough in the Championship at Elland Road.
The visitors took the lead through Lukas Jutkiewicz, whose shot was saved before he scored with a follow-up via a deflection.
Becchio equalised with a half-volley on the stroke of half-time after Boro failed to clear their lines.
And he headed in a corner to secure victory and take his tally for the season to 17.
The victory came a day after GFH Capital confirmed its 100% buyout of Leeds.
It was Leeds' fourth successive home league win - a feat they last achieved in October 2011 - and lifted them to eighth in the table.
Middlesbrough missed out on a hat-trick of league wins as they dropped six points behind leaders Cardiff.
The visitors opened brightly, Scott McDonald firing narrowly wide in the second minute and Leeds looking toothless in attack early on.
Sam Byram's downward header, which drew a superb save from goalkeeper Jason Steele, was as close as Leeds came before Jutkiewicz beat Paddy Kenny at the second attempt after sprinting clear.
After the break, Boro defender Jonathan Woodgate, playing against his former club, fluffed his attempted clearance from Byram's cross to give Becchio space to lash home off the woodwork.
Jutkiewicz was denied by Kenny's midriff as he closed in on goal, but Becchio showed the more ruthless edge.
After his header from a Diouf cross was tipped over by Steele, he rose highest from the resulting corner to beat the goalkeeper with another header.
The visitors had 17 minutes to earn a share of the points, but, despite Emmanuel Ledesma and even Steele going close, Leeds clung on.
Leeds manager Neil Warnock: "It was a super day for our new owners at the end of a really positive week. I have to be delighted, especially coming from behind to beat a very good side. We put our bodies on the line near the end and there were a lot of tired legs out there."
Middlesbrough manager Tony Mowbray: "We had a host of chances and missed them. We were through one-on-one two or three times and threatened the goal more than enough to have got something out of the game, but give Leeds credit. They worked hard and defended well without putting us under much pressure."
Live Text Commentary
Full Time The referee signals the end of the game.90:00 +3:57
Corner from the right by-line taken by Emmanuel Ledesma, clearance by Jason Pearce.90:00 +3:30
Inswinging corner taken right-footed by Grant Leadbitter from the left by-line, clearance by Samuel Byram.90:00 +2:13
Free kick awarded for an unfair challenge on Lukas Jutkiewicz by Jason Pearce. Josh McEachran restarts play with the free kick.90:00 +0:58 Booking
Booking David Norris booked.90:00 +0:32
David Norris concedes a free kick for a foul on Grant Leadbitter. Jason Steele takes the direct free kick.89:35
Stuart Parnaby gives away a free kick for an unfair challenge on El-Hadji Diouf. Michael Tonge takes the free kick.88:10
Marvin Emnes has an effort from just inside the box that misses to the left of the target.83:50
Shot from just outside the box by George Friend goes over the bar.83:33
Corner from right by-line taken by Emmanuel Ledesma.83:19
Emmanuel Ledesma takes a shot. Save by Patrick Kenny.82:23
Grant Leadbitter has an effort at goal from outside the area which goes wide right of the goal.80:06
Luciano Becchio fouled by Stuart Parnaby, the ref awards a free kick. Direct free kick taken by Patrick Kenny.79:15 Substitution
Substitution Andrew Halliday replaces Scott McDonald.78:04
El-Hadji Diouf fouled by Grant Leadbitter, the ref awards a free kick. Free kick crossed right-footed by El-Hadji Diouf, Jason Steele makes a save.76:49 Substitution
Substitution (Leeds) makes a substitution, with Jason Pearce coming on for Lee Peltier.75:15 Substitution
Substitution Stuart Parnaby on for Justin Hoyte.75:15 Substitution
Substitution Emmanuel Ledesma replaces Richard Smallwood.75:15
The offside flag is raised against Lukas Jutkiewicz. Patrick Kenny takes the free kick.73:42
Corner taken right-footed by Grant Leadbitter, Jonathan Woodgate has a headed effort at goal from deep inside the area missing to the left of the target.
Assist by El-Hadji Diouf.72:22 Goal scored
Goal! - Luciano Becchio - Leeds Utd 2 - 1 Middlesbro Luciano Becchio finds the back of the net with a headed goal from inside the area. Leeds 2-1 Middlesbrough.71:48
El-Hadji Diouf takes the inswinging corner,71:33
Luciano Becchio takes a shot. Save by Jason Steele.70:59
El-Hadji Diouf fouled by Jonathan Woodgate, the ref awards a free kick. David Norris takes the direct free kick.68:29
Free kick awarded for an unfair challenge on Tom Lees by Lukas Jutkiewicz. Patrick Kenny restarts play with the free kick.67:54 Substitution
Substitution Jerome Thomas goes off and Davide Somma comes on.67:04
Michael Tonge challenges Grant Leadbitter unfairly and gives away a free kick. Free kick taken by Grant Leadbitter.65:38 Booking
Booking George Friend is given a yellow card.65:31
George Friend challenges Samuel Byram unfairly and gives away a free kick. Direct free kick taken by El-Hadji Diouf.63:40
Luciano Becchio handles the ball and concedes a free kick. Free kick taken by Jason Steele.62:49
Aidan White delivers the ball.59:43
Grant Leadbitter has an effort at goal from outside the box missing to the wide left of the goal.59:19
Outswinging corner taken by Richard Smallwood, Michael Tonge manages to make a clearance.59:04
Lukas Jutkiewicz takes a shot. Save by Patrick Kenny.58:18
El-Hadji Diouf crosses the ball.55:42
Corner taken left-footed by Josh McEachran.54:58
Marvin Emnes takes a shot. Blocked by Lee Peltier. Inswinging corner taken right-footed by Grant Leadbitter from the left by-line to the near post, save made by Patrick Kenny.53:52
Free kick awarded for an unfair challenge on Marvin Emnes by Alan Tate. Free kick taken by Grant Leadbitter.52:47
Corner from the right by-line taken by Josh McEachran, Alan Tate manages to make a clearance.51:54
Michael Tonge takes a shot. Blocked by Seb Hines.48:51
A cross is delivered by Aidan White.46:51
Lukas Jutkiewicz produces a left-footed shot from deep inside the penalty box which goes wide of the left-hand upright.46:08
Aidan White takes a shot. Save by Jason Steele.45:01
The referee gets the second half underway.45:01 Substitution
Substitution Aidan White replaces Paul Green.45:00 +1:08 Half time
Half Time The ref blows to end the first period.44:08 Goal scored
Goal! - Luciano Becchio - Leeds Utd 1 - 1 Middlesbro Luciano Becchio grabs a goal from deep inside the penalty box to the top left corner of the goal. Leeds 1-1 Middlesbrough.38:13
Josh McEachran fouled by Lee Peltier, the ref awards a free kick. Direct free kick taken by Jason Steele.37:22
The ball is delivered by Richard Smallwood.33:39
Lee Peltier gives away a free kick for an unfair challenge on Lukas Jutkiewicz. Scott McDonald takes the free kick.31:47
Jerome Thomas has an effort at goal from just inside the box that misses to the right of the goal.31:12
Corner taken by Josh McEachran from the right by-line, save made by Patrick Kenny.30:24
Samuel Byram has an effort at goal from outside the area which misses left.29:04 Goal scored
Goal! - Lukas Jutkiewicz - Leeds Utd 0 - 1 Middlesbro Lukas Jutkiewicz finds the back of the net with a goal from inside the area to the top left corner of the goal. Leeds 0-1 Middlesbrough.28:23
Lukas Jutkiewicz takes a shot. Save made by Jason Steele.22:12
The assistant referee flags for offside against Luciano Becchio. Jonathan Woodgate restarts play with the free kick.19:01
Samuel Byram takes a shot. Save by Jason Steele.18:32
Foul by Grant Leadbitter on Luciano Becchio, free kick awarded. El-Hadji Diouf takes the direct free kick.18:01
Foul by Marvin Emnes on David Norris, free kick awarded. Free kick taken by Patrick Kenny.17:25
Free kick awarded for a foul by David Norris on Lukas Jutkiewicz. George Friend takes the free kick.15:46
Shot from just outside the penalty box by Josh McEachran misses to the left of the target.12:59
Seb Hines gives away a free kick for an unfair challenge on Luciano Becchio. Michael Tonge produces a shot on goal direct from the free kick.11:51
Seb Hines concedes a free kick for a foul on Lee Peltier. Direct free kick taken by Lee Peltier.5:30
Lukas Jutkiewicz has a headed effort at goal from deep inside the area missing to the right of the goal.5:08
George Friend fouled by Paul Green, the ref awards a free kick. George Friend takes the free kick.3:58
The referee blows for offside. Indirect free kick taken by Jason Steele.3:40
Free kick awarded for an unfair challenge on David Norris by Grant Leadbitter. Free kick taken by Alan Tate.2:43
The ball is sent over by Scott McDonald.1:03
Lukas Jutkiewicz produces a left-footed shot from just outside the penalty box that misses to the left of the target.0:00
The match gets underway.
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