Burnley climbed to within a point of the play-off places in the Championship as a fine first-half display steered them to victory.
Top scorer Jay Rodriguez gave Eddie Howe's visitors an early lead when he converted a well-worked set piece.
Kieran Trippier doubled the lead when he beat rookie goalkeeper Connor Ripley - son of former Boro winger Stuart - from distance.
The defeat leaves Boro five points behind leaders Southampton.
Middlesbrough had new signing from Coventry, Lukas Jutkiewicz, on the bench and Jason Steele's groin injury meant Ripley made his full debut in goal.
But the 18-year-old's first task was to pick the ball out of the net as David Edgar dummied Ross Wallace's corner for Rodriguez to drill home his 14th of the season.
Dean Marney was inches away from doubling the advantage as his fizzing 20-yard volley flashed narrowly past the post, while Rodriguez was off target with a half-volley on the turn.
Trippier then speculatively let fly from 35 yards and somehow found a way through Ripley's defences.
Rodriguez dragged his shot wide at the start of the second period before Jutkiewicz blasted a good chance over the top.
Middlesbrough manager Tony Mowbray:
"We huffed and puffed at times and just couldn't score.
"Lukas [Jutkiewicz] gives an extra dimension up front. He is big, physical and strong and has qualities we didn't have in the squad before."
Burnley manager Eddie Howe:
"We played very well. We counter-attacked superbly in the first half and at times we cut them open.
"We could have had more goals if truth be told.
"We've won seven out of nine now. There's no reason if this squad can keep it up that we can't compete with the very best in this league."
- 31 Ripley
- 02 Hoyte
- 03 Bennett
- 04 Bates
- 14 Williams Booked
- 18 Arca (McMahon - 68' )
- 08 Thomson
- 33 Smallwood (Jutkiew'z - 57' )
- 38 Haroun Booked
- 07 McDonald (Zemmama - 75' )
- 09 Emnes
- 06 McManus
- 29 McMahon
- 05 Zemmama
- 22 Martin
- 30 Jutkiew'z
- 01 Grant
- 02 Trippier
- 04 Duff
- 15 Edgar
- 36 Mee
- 06 McCann
- 07 Wallace
- 08 Marney Booked
- 11 Stanislas (Bartley - 55' )
- 09 Rodriguez
- 10 Paterson Booked (Austin - 85' )
- 12 Jensen
- 24 Easton
- 20 Bartley
- 19 Vokes
- 23 Austin
Live Text Commentary
Full Time The referee ends the match.90:00 +3:08
A cross is delivered by Joe Bennett, clearance made by Michael Duff.90:00 +2:26
Centre by Tony McMahon.90:00 +1:49
Tony McMahon crosses the ball.90:00 +0:47
Short corner taken by Ross Wallace.89:43
Tony McMahon crosses the ball.87:54
Tony McMahon has an effort at goal from 20 yards. Save by Lee Grant.84:54 Substitution
Substitution (Burnley) makes a substitution, with Charlie Austin coming on for Martin Paterson.83:11
A cross is delivered by Tony McMahon, Lukas Jutkiewicz has a headed effort at goal from just inside the box that misses to the left of the goal.83:01
Justin Hoyte delivers the ball, blocked by Ben Mee.81:59
The ball is sent over by Joe Bennett, clearance made by Ben Mee.81:05
The offside flag is raised against Joe Bennett. Lee Grant restarts play with the free kick.80:04
Foul by Jay Rodriguez on Kevin Thomson, free kick awarded. Kevin Thomson restarts play with the free kick.77:32
Inswinging corner taken by Tony McMahon from the right by-line. Corner from the right by-line taken by Tony McMahon, inswinging corner taken by Tony McMahon, Shot on goal by Justin Hoyte from just inside the area goes over the target. Merouane Zemmama has a drilled shot. David Edgar gets a block in.77:23
Justin Hoyte delivers the ball, David Edgar makes a clearance.75:35
Justin Hoyte sends in a cross, save by Lee Grant.74:56 Substitution
Substitution Merouane Zemmama comes on in place of Scott McDonald.74:12
Free kick awarded for a foul by Marvin Bartley on Kevin Thomson. Connor Ripley restarts play with the free kick.71:15
A cross is delivered by Chris McCann, Lukas Jutkiewicz makes a clearance.70:33 Booking
Booking Faris Haroun shown a yellow card.
Faris Haroun gives away a free kick for an unfair challenge on Martin Paterson. Direct free kick taken by Kieran Trippier.67:24 Substitution
Substitution Tony McMahon replaces Julio Arca.67:00
Scott McDonald has a shot on goal from outside the box which misses left.66:33
Lukas Jutkiewicz takes a shot from just outside the penalty area which clears the crossbar.63:26
Lukas Jutkiewicz fouled by Dean Marney, the ref awards a free kick. Direct free kick taken by Connor Ripley.62:13
Kevin Thomson concedes a free kick for a foul on Dean Marney. Free kick taken by Michael Duff.59:20 Booking
Booking Dean Marney receives a caution for unsporting behaviour.59:06
Unfair challenge on Marvin Emnes by Dean Marney results in a free kick. Kevin Thomson restarts play with the free kick.58:27
The ball is crossed by Joe Bennett, save by Lee Grant.57:06
Inswinging corner taken by Ross Wallace, Connor Ripley makes a save.56:20 Substitution
Substitution Lukas Jutkiewicz comes on in place of Richard Smallwood.54:45
Corner taken left-footed by Ross Wallace, Rhys Williams manages to make a clearance.54:09 Substitution
Substitution Marvin Bartley joins the action as a substitute, replacing Junior Stanislas.51:58
The ball is swung over by Justin Hoyte, David Edgar makes a clearance.51:44
Handball by Kieran Trippier. Free kick taken by Julio Arca.51:09
Free kick awarded for a foul by Martin Paterson on Kevin Thomson. Free kick taken by Rhys Williams.49:43
Unfair challenge on Martin Paterson by Rhys Williams results in a free kick.48:56
Ross Wallace crosses the ball in from the free kick, clearance made by Rhys Williams.48:56 Booking
Booking Martin Paterson goes into the book for unsporting behaviour.48:14
Free kick awarded for a foul by Martin Paterson on Justin Hoyte. Connor Ripley takes the free kick.46:45
Centre by Joe Bennett, Kieran Trippier gets a block in.45:35
Effort from the edge of the box by Jay Rodriguez goes wide of the right-hand upright.45:07
Shot by Faris Haroun cleared the bar.45:01
The referee gets the second half underway.45:00 +1:26 Half time
Half Time The referee blows for half time.45:00 +0:32
Free kick awarded for an unfair challenge on Ross Wallace by Scott McDonald. Indirect free kick taken by Lee Grant.45:00 +0:07
Jay Rodriguez takes the chance to get an effort at goal. Save by Connor Ripley.44:18
Free kick awarded for an unfair challenge on Scott McDonald by Kieran Trippier. Richard Smallwood takes the free kick.42:50
The free kick is swung in right-footed by Kieran Trippier.42:50 Booking
Booking Rhys Williams receives a caution for unsporting behaviour.42:34
Rhys Williams concedes a free kick for a foul on Dean Marney.40:19
Faris Haroun is flagged offside by the assistant referee. Lee Grant takes the direct free kick.38:50
Outswinging corner taken left-footed by Julio Arca from the left by-line, Header from deep inside the penalty area by Faris Haroun goes harmlessly over the crossbar.37:10
Inswinging corner taken right-footed by Junior Stanislas from the left by-line, Matthew Bates manages to make a clearance.35:40
Michael Duff concedes a free kick for a foul on Scott McDonald. Marvin Emnes produces a shot on goal direct from the free kick.34:45
Justin Hoyte sends in a cross, blocked by David Edgar.32:58
Inswinging corner taken left-footed by Julio Arca from the right by-line, clearance by Ben Mee.32:48
The ball is delivered by Faris Haroun, Junior Stanislas gets a block in.30:29
Unfair challenge on Jay Rodriguez by Marvin Emnes results in a free kick. Ben Mee takes the direct free kick.27:43 Goal scored
Goal! - Kieran Trippier - Middlesbro 0 - 2 Burnley A goal is scored by Kieran Trippier. Middlesbrough 0-2 Burnley.26:09
Junior Stanislas sends in a cross, Effort on goal by Martin Paterson from deep inside the penalty area misses to the right of the target.24:30
The ball is swung over by Joe Bennett.24:03
Centre by Justin Hoyte, clearance by Kieran Trippier.23:21
Free kick awarded for a foul by Chris McCann on Marvin Emnes. Direct free kick taken by Kevin Thomson.21:47
Dean Marney gives away a free kick for an unfair challenge on Marvin Emnes. Direct free kick taken by Matthew Bates.20:56
Ross Wallace has an effort at goal from outside the penalty box which goes wide left of the goal.20:13
Kieran Trippier takes a shot and cleared the bar.18:33
The ball is swung over by Faris Haroun, Lee Grant makes a save.17:34
Jay Rodriguez produces a drilled left-footed shot from deep inside the area which goes wide of the left-hand post.15:46
Outswinging corner taken by Julio Arca, clearance made by Chris McCann.15:35
A cross is delivered by Joe Bennett, clearance made by Kieran Trippier.14:35
Foul by Ben Mee on Faris Haroun, free kick awarded. Richard Smallwood takes the free kick.12:12
Richard Smallwood challenges Martin Paterson unfairly and gives away a free kick. Direct free kick taken by Kieran Trippier.11:09
Dean Marney produces a right-footed shot from just outside the penalty box that goes wide left of the target.9:22
Foul by Dean Marney on Julio Arca, free kick awarded. Direct free kick taken by Rhys Williams.8:09
Justin Hoyte produces a cross, clearance made by Michael Duff.7:29
Martin Paterson gives away a free kick for an unfair challenge on Matthew Bates. Direct free kick taken by Matthew Bates.5:10
Assist by Ross Wallace.5:10 Goal scored
Goal! - Jay Rodriguez - Middlesbro 0 - 1 Burnley Jay Rodriguez finds the net with a goal from just inside the area to the bottom right corner of the goal. Middlesbrough 0-1 Burnley.4:34
Inswinging corner taken by Ross Wallace,3:39
Martin Paterson is flagged offside by the assistant referee. Connor Ripley takes the direct free kick.1:26
Chris McCann concedes a free kick for a foul on Scott McDonald. Direct free kick taken by Kevin Thomson.0:00
The referee starts the match.
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