Opportunistic Ricky Holmes and Simon Ferry strikes either side of the break helped seal Portsmouth's first away win of the season at Burton.
Holmes latched onto a Jordan Pickford save from a Patrick Agyemang header to put the visitors ahead.
Ferry then pounced on another Pickford save to stab in from close-range.
Pompey defender Yassin Moutaouakil was red carded late on for a kick on Jimmy Phillips before Zander Diamond netted a consolation goal for Albion.
VIEW FROM THE CHANGING ROOM
Burton manager Gary Rowett told BBC Radio Derby:
"We've not done enough to win the game I believe.
"At home we've just not quite played with anywhere near the intensity and brightness that we did last season.
"We knew that would be difficult to replicate and we've been better away from home certainly so far but at home we've just not created enough chances I don't think.
We've not worked hard enough to create the chances. We're not getting the rub of the green at the minute. You can certainly argue with that about the second goal. I just cannot understand for the life of me but that was a foul."
Portsmouth manager Guy Whittingham speaking to BBC Radio Solent:
"It's very pleasing because we've done a lot of hard work during the week, you know when we have leads, how to protect them and I think we did that very well today.
"It's probably the game, out of all the games we've played so far, we've probably created the least amount of chances for us, but that's the balance we're looking for; where you create chances, you score goals and you also have to make sure that you're hard to beat."
(On missing out on a clean sheet) "Again, we've conceded with 10 men. Who knows if we'd have seen it out with 11 but we'd like to have thought so."
(On Yassin Moutaouakil's red card ) "You know in football if you're a footballer you can't kick out at people no matter how much you're wound up or you think you've had injustice, you can't do that, so the referee was left with no choice."
Live text and stats
Saturday, 14 September 2013
21 Holness yellow card
07 Bell yellow card
09 Howe (MacDonald 59)
02 Moutaouakil red card
05 Devera (Ngala 8)
06 Bradley yellow card
11 Holmes (Cooper 85)
23 Agyemang (Craddock 90)
Ref: WhitestoneAtt: 3,577
Attempts on target
Attempts off target
90:00+5:51 The referee signals the end of the game.
90:00+5:37 GOAL - Zander Diamond:Burton 1 - 2 Portsmouth Zander Diamond grabs a goal with a right foot finish. Burton Albion 1-2 Portsmouth.
90:00+2:42 Alex MacDonald has an effort at goal. John Sullivan catches the ball.
90:00+2:29 Jordan Pickford restarts play with the free kick.
90:00+2:23 Foul by Tom Craddock on Alex MacDonald, free kick awarded.
90:00+2:10 Corner taken by Jed Wallace.
90:00+1:13 John Sullivan restarts play with the free kick.
90:00+0:34 Unfair challenge on Bondz N'Gala by Michael Symes results in a free kick.
90:00+0:29 Corner from the left by-line taken by Alex MacDonald.
89:27 John Sullivan restarts play with the free kick.
89:21 Unfair challenge on Bondz N'Gala by Michael Symes results in a free kick.
89:11 Substitution Tom Craddock replaces Patrick Agyemang.
88:37 Alex MacDonald takes a shot and bounced off the bar.
88:10 Free kick taken by Alex MacDonald.
87:45 Free kick awarded for a foul by Simon Ferry on Jimmy Phillips.
86:27 Jimmy Phillips crosses the ball.
84:54 Substitution Shaun Cooper comes on in place of Ricky Holmes.
83:34 Sent off
83:34 Red card for Yassin Moutaouakil.
82:51 Jordan Pickford takes the free kick.
82:11 Unfair challenge on Marcus Holness by Patrick Agyemang results in a free kick.
81:21 Substitution Adam McGurk leaves the field to be replaced by Dominic Knowles.
79:13 Zander Diamond produces a cross.
79:00 Free kick taken by Marcus Holness.
78:49 Johnny Ertl challenges Jimmy Phillips unfairly and gives away a free kick.
78:22 Michael Symes takes a shot and missed to the right of the target.
77:32 Centre by Jimmy Phillips.
77:26 Corner taken by Alex MacDonald.
74:24 Clearance made by Marcus Holness.
74:18 Danny East restarts play with the free kick.
73:54 Free kick awarded for an unfair challenge on Ricky Holmes by Lee Bell.
73:46 Johnny Ertl restarts play with the free kick.
73:41 Foul by Alex MacDonald on Johnny Ertl, free kick awarded.
73:03 Corner taken by Alex MacDonald.
72:39 Shot by Adam McGurk.
72:16 Sonny Bradley manages to make a clearance.
72:07 Michael Symes produces a cross.
70:01 Damien McCrory takes the free kick.
69:55 Lee Bell fouled by Johnny Ertl, the ref awards a free kick.
69:27 Free kick taken by John Sullivan.
68:51 The assistant referee flags for offside against Michael Symes.
68:21 Clearance by Bondz N'Gala.
67:57 Shot by Bondz N'Gala went harmlessly over the bar.
67:51 Corner taken by Johnny Ertl.
66:59 Bondz N'Gala makes a clearance.
66:56 Jimmy Phillips restarts play with the free kick.
66:50 Caution for Sonny Bradley.
66:40 Sonny Bradley concedes a free kick for a foul on Matthew Palmer.
64:55 The ball is sent over by Matthew Palmer.
64:46 Corner taken by Jimmy Phillips.
63:26 Free kick taken by John Sullivan.
63:07 The official flags Michael Symes offside.
61:58 Clearance made by Marcus Holness.
61:55 Corner taken by Ricky Holmes from the right by-line.
60:58 Free kick crossed by Ricky Holmes.
60:32 Phil Edwards gives away a free kick for an unfair challenge on Ricky Holmes.
59:32 Free kick crossed by Phil Edwards.
59:25 Free kick awarded for an unfair challenge on Phil Edwards by Jed Wallace.
58:36 Substitution Matthew Palmer is brought on as a substitute for Adam Reed.
58:25 Substitution Rene Howe leaves the field to be replaced by Alex MacDonald.
55:35 Yassin Moutaouakil crosses the ball in from the free kick.
55:28 Free kick awarded for an unfair challenge on Yassin Moutaouakil by Adam Reed.
54:51 Header at goal by Patrick Agyemang goes over the bar.
54:41 Ricky Holmes crosses the ball in from the free kick.
54:30 The referee shows Lee Bell a yellow card for unsporting behaviour.
54:19 Unfair challenge on Simon Ferry by Lee Bell results in a free kick.
54:03 Marcus Holness goes into the referee's book.
53:18 Johnny Ertl restarts play with the free kick.
53:08 Free kick awarded for an unfair challenge on Johnny Ertl by Adam Reed.
52:33 GOAL - Simon Ferry:Burton 0 - 2 Portsmouth Simon Ferry scores with a right foot finish. Burton Albion 0-2 Portsmouth.
52:23 Shot by Ricky Holmes. Parried by Jordan Pickford back into danger.
Correction - 52:03 Marcus Holness is cautioned.
Correction - 52:03 Booking
Correction - 51:33 GOAL - Simon Ferry:Burton 0 - 2 Portsmouth Simon Ferry slots the ball right footed into the goal. Burton Albion 0-2 Portsmouth.
Correction - 51:23 Ricky Holmes has an effort at goal. Jordan Pickford fumbles the ball.
50:32 Jordan Pickford takes the free kick.
50:17 Patrick Agyemang gives away a free kick for an unfair challenge on Zander Diamond.
49:47 Michael Symes takes a shot.
46:35 Adam McGurk takes a shot.
45:01 The referee starts the second half.
45:00+2:40 The whistle is blown to end the first half.
45:00+2:06 Jordan Pickford restarts play with the free kick.
45:00+1:55 Foul by Patrick Agyemang on Zander Diamond, free kick awarded.
45:00+1:16 Free kick taken by Danny East.
45:00+1:06 Free kick awarded for an unfair challenge on Jed Wallace by Lee Bell.
44:46 Adam McGurk takes a shot and missed to the left of the net.
41:53 Adam Reed has an effort at goal. John Sullivan makes a block.
40:27 Corner taken by Jimmy Phillips from the left by-line.
40:08 Shot by Adam McGurk.
38:48 Free kick taken by John Sullivan.
38:34 The referee blows for offside.
36:46 Ricky Holmes takes a shot and goes harmlessly over the bar.
36:40 Corner taken by Jed Wallace.
35:56 Andy Barcham takes the chance to get an effort at goal.
35:52 Yassin Moutaouakil delivers the ball.
34:39 John Sullivan takes the free kick.
34:36 Rene Howe is caught offside.
33:10 GOAL - Ricky Holmes:Burton 0 - 1 Portsmouth Ricky Holmes scores with their right foot. Burton Albion 0-1 Portsmouth.
32:57 Patrick Agyemang takes a shot. Jordan Pickford parries the ball but the danger is not over.
32:39 The ball is crossed by Jed Wallace.
29:48 Free kick taken by Marcus Holness.
29:40 Ricky Holmes challenges Adam Reed unfairly and gives away a free kick.
27:26 Header by Michael Symes misses left.
27:02 Jordan Pickford restarts play with the free kick.
26:45 Free kick awarded for a foul by Johnny Ertl on Lee Bell.
25:54 Free kick taken by John Sullivan.
25:44 Free kick awarded for a foul by Michael Symes on Bondz N'Gala.
23:08 Adam Reed has an effort at goal and missed to the left of the target.
22:56 Marcus Holness manages to make a clearance.
22:41 Ricky Holmes has an effort at goal.
21:57 John Sullivan takes the free kick.
21:39 Michael Symes is flagged offside by the assistant referee.
18:36 Rene Howe takes a shot and missed to the left of the target.
17:39 Marcus Holness manages to make a clearance.
17:24 Free kick crossed by Jed Wallace.
17:17 Damien McCrory concedes a free kick for a foul on Jed Wallace.
14:43 Clearance made by Zander Diamond.
14:31 Free kick taken by John Sullivan.
13:10 Danny East fouled by Michael Symes, the ref awards a free kick.
9:00 Adam McGurk makes a clearance.
8:51 Corner taken by Jed Wallace.
8:24 Jed Wallace takes a shot. A parry by Jordan Pickford prevents the goal.
7:53 Substitution (Portsmouth) makes a substitution, with Bondz N'Gala coming on for Joe Devera.
5:18 Clearance by Joe Devera.
5:10 Free kick taken by Jordan Pickford.
4:58 Ricky Holmes concedes a free kick for a foul on Jimmy Phillips.
1:09 Shot by Marcus Holness went wide of the right-hand post.
0:51 Corner taken by Jimmy Phillips from the left by-line.
0:00 The referee gets the game underway.
Live text and data provided by The Press Association.
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