Barnsley made it three wins in four under Valerien Ismael with a 2-0 victory over lowly Derby County at Pride Park on Saturday. 
Conor Chaplin put the Reds in front after 30 minutes having been gifted the ball by a horrendous error by goalkeeper David Marshall.
The win was secured late on when substitute Victor Adeboyejo scored his first goal in the Championship and his first for Barnsley in any league in more than two years. 
It was a first away win of the season for the Reds who are now 16th in the table, six points clear of the relegation zone. 
Ismael made two changes to the side that lost 3-0 at Cardiff City as Cauley Woodrow and Callum Brittain returned from injury and replaced Patrick Schmidt, who dropped to the bench, and Elliot Simoes, who was not in the squad. 
The visitors made a very bright start with Callum Styles, after a fine run down the left, playing in Dominik Frieser at a tight angle on the left of the area five yards out but his powerful effort was kept out by Marshall. Woodrow then headed over after the resulting Matty James corner was nodded up in the air by a defender.
Derby almost took the lead in the sixth minute when goalkeeper Jack Walton rushed out of his box to meet a ball down the right but Martyn Waghorn got there first and nudged the ball across the box but Michal Helik cleared. 
Brittain then put in a good cross from the right but a tightly marked Woodrow seemed to mistime his header and the ball came off his shoulder and went well wide. 
Derby's first shots on target came in the 22nd minute from Tom Lawrence whose 20-yard effort was well-saved by Walton diving to his left, then goalkeeper denied the same player with his chest from a tight angle on the right of the box after the ball was recycled. 
The goal arrived after half an hour when Marshall tried to roll the ball out to a defender but Chaplin intercepted and fired into the goal from the left of the box. 
Alex Mowatt should have made it 2-0 on 43 minutes but he fired wide of the bottom right corner from the left of the box 15 yards out after clever backheels by both Chaplin and Woodrow. There was still time for Chaplin to curl a 25-yard free-kick just wide of the bottom left corner before the interval. 
Derby changed from three at the back to a 4-3-3 at half-time. Chaplin had another free-kick just after the break but curled it over the bar from 22 yards. Waghorn, at the other end, sent a 25-yard free-kick just wide of the top right corner. Left-back Lee Buchanan then fired into the side netting from the left of the box before Lawrence shot wide from 30 yards. 
Styles could have made it 2-0 but, after a good run and pass by Mowatt saw him receive the ball in space on the left of the box, he fired wide of the bottom right corner from 15 yards. Another good Mowatt pass then played Chaplin in on the left of the box with Woodrow free on his right but he ballooned a cross into the air for Marshall to catch. 
Substitute Herbie Kane then shot from 12 yards out after a good move on the left but Marshall dived to his left to save easily. Jozwiak shot from 25 yards but it was straight at Walton who saved easily. 
It was 2-0 with seven minutes when a good move from deep in the Barnsley half involving passes by Woodrow, Kane and Chaplin finished with Adeboyejo firing into the bottom right corner from outside the box. 
Chaplin almost made it 3-0 in the 90th minute after scampering into the box on the right but his shot was saved by Marshall who dived to his right. 
Barnsley (3-4-3): Walton; Sollbauer, Helik, Andersen; Brittain, Mowatt, James (Kane 60mins), Styles; Frieser (Adeboyejo 77), Woodrow (Halme 82), Chaplin. Unused: Collins, Schmidt, Oduor, Thomas. Yellow cards: Andersen, Sollbauer. Goals: Chaplin 30, Adeboyejo 83. 
Derby (4-2-3-1): Marshall; Clarke (Jozwiak HT), Bielik, Davies; Byrne, Shinnie (Sibley 58mins); Knight, Buchanan: Rooney, Lawrence (Kazim-Richards 79); Waghorn. Unused: Roos, Wisdom, Bird, Holmes 
AS IT HAPPENED
  •  
    GAME UNDERWAY
  • 3:01pm
    Derby are playing a back three to match Barnsley
  • 3:03pm
    3 A decent start for the visitors. They have had more of the ball so far and most of it in the home half
  • 3:03pm
    4 Big chance for the Reds. A fine run and pass by Styles plays in Frieser on the left of the box but the goalkeeper makes a fine save
  • 3:04pm
    4 James' corner is headed up in the air by a defender to Woodrow at the back post but he lofts a header over the bar
  • 3:05pm
    6 Big chance for the hosts now as Walton rushes out of his box to try to meet a ball down the right but Waghorn touches the ball past him and Helik has to clear near his goal line
  • 3:09pm
    The visitors were on top in the first five minutes but the hosts have had the better of the next five. A decent start to the match
  • 3:11pm
    Liam Rosenior, the former Premier League defender, is the main man in the dugout for the hosts today but Phillip Cocu is issuing instructions from home as he isolates
  • 3:11pm
    11 Brittain blocks a cross and the ball goes out for a corner on the left
  • 3:12pm
    12 The corner is blocked at the near post by Woodrow and cleared by Chaplin
  • 3:13pm
    13 Wayne Rooney takes a free-kick on the right 35 yards out and Helik heads clear
  • 3:15pm
    A quarter of an hour gone and Barnsley, after a good start, have defended for much of the last ten minutes. But the best chance so far fell to Dominik Frieser who drew a good save from David Marshall
  • 3:19pm
    18 A second headed chance of the game for Woodrow. Brittain does well on the right to beat a man and send in a cross but Barnsley's top-scorer is tightly marked and the ball seems to come off the top of his shoulder and go well wide
  • 3:21pm
    21 Big chances for the hosts. Byrne's pass from right to left finds Tom Lawrence who takes the ball to the edge of the box then shoots but Walton flings himself to his left to make a good save. The ball is recycled then Lawrence gets it on the right of the box at a tight angle but his shot is saved by the goalkeeper's chest
  • 3:25pm
    A quarter of the way through the game. Barnsley started really brightly and Frieser had a good chance but, since then, they have struggled to keep possession for longer than a few seconds and the hosts have been on top. Jack Walton made two good saves from Tom Lawrence just now.
  • 3:29pm
    GOAL!
    Conor Chaplin scores after a terrible defensive error by the hosts!
  • 3:31pm
    David Marshall, making his 415th Championship appearance, sends the ball straight to Chaplin on the left of the box and he fires into the net for his second goal of the season
  • 3:33pm
    That goal has given the visitors a boost and now Chaplin wins a corner on the left
  • 3:34pm
    34 Matty James' corner from the left is short to Styles whose cross is punched out by Marshall. Styles then has a shot that is blocked
  • 3:36pm
    37 Walton drops a Rooney free-kick but the referee sees a foul against the goalkeeper
  • 3:38pm
    39 Byrne crosses from the right but Walton dives out to punch at Waghorn's feet. Brave goalkeeping
  • 3:41pm
    Derby still on top here but they are yet to carve out a real chance in the last 20 minutes
  • 3:44pm
    43 A big chance for 2-0. Excellent back heels on the left wing by first Chaplin then Woodrow mean Mowatt is free in the box but his shot from 15 yards out is wide of the bottom right corner
  • 3:44pm
    44 Now there's a bit of a scramble in the box but Barnsley make some blocks before they can clear
  • 3:45pm
    One added minute
  • 3:45pm
    45+1 Barnsley have a free-kick centrally and 30 yards from goal. Conor Chaplin curls it just wide of the bottom left corner
  • 3:46pm
    HALF-TIME: Derby 0, Barnsley 1. A major goalkeeping error from David Marshall gifted Conor Chaplin the only goal
  • 4:02pm
    SECOND HALF UNDERWAY
  • 4:04pm
    47 A nice move sees Chaplin pass to Woodrow who exchanges passes with James but is shoved to the ground by a defender 20 yards out
  • 4:04pm
    48 Chaplin's free-kick just outside the box curls over the bar
  • 4:10pm
    Derby have returned to 4-3-3 for the second half, Winger Kamil Jozwiak replaced centre-back Matt Clarke at the break
  • 4:13pm
    A good first ten minutes of the second half for the Reds, who are not letting the hosts control possession
  • 4:13pm
    57 Styles' corner hooked cleared then Mowatt plays it back to him and he fizzes a cross across the first of goal
  • 4:14pm
    Louie Sibley on for Graeme Shinnie
  • 4:15pm
    YELLOW CARD
    Mads Andersen booked for a foul on Jozwiak
  • 4:15pm
    Barnsley's first substitute sees Herbie Kane replace Matty James who has had a solid game today
  • 4:16pm
    James has played a lot of football in the last two weeks after none in the previous two and a half years. It make sense to replace him but he had started the second half brightly
  • 4:18pm
    YELLOW CARD
    Michael Sollbauer a second yellow card in a couple of minutes as he gives away a free-kick 30 yards out
  • 4:18pm
    62 Waghorn's free-kick is just wide of the top right corner
  • 4:19pm
    64 The ball now falls nicely for Chaplin about 25 yards out but he blazes it high and wide
  • 4:20pm
    64 Now Derby left back Lee Buchanan hits the side netting inside the box from the a tight angle
  • 4:23pm
    66 Now Tom Lawrence fires wide with a 30-yard low effort
  • 4:25pm
    68 Big chance for 2-0. Alex Mowatt runs deep in the home box then passes to his left to Styles who is just inside the box but fires wide of the bottom right corner. It was a big chance as he had plenty of space
  • 4:30pm
    74 Another chance for the Reds. After a good move on the left, Kane's 12-yard effort lacks pace and the goalkeeper easily dives to his left to save
  • 4:32pm
    76 Jozwiak shoots from 25 yards but it is straight at Walton
  • 4:33pm
    Adeboyejo replaces Frieser
  • 4:35pm
    Derby's final change sees Colin Kazim-Richards replace Tom Lawrence
  • 4:39pm
    In the 82nd minute here. Derby are having a lot of the ball, most of it in the away box, but they are yet to create a really good chance in the second half
  • 4:39pm
    GOAL!
    Victor Adeboyejo with a stunning goal!
  • 4:41pm
    It's his first Barnsley goal for more than two years, he curls beautifully into the bottom right corner from outside the box
  • 4:43pm
    That was a very good move started by calm passes from both Woodrow and Herbie Kane who released Conor Chaplin who played the ball on to Adeboyejo
  • 4:43pm
    Derby are still attacking but really struggling to break through the Reds backline
  • 4:44pm
    88 Derby win a corner on the left wing
  • 4:44pm
    88 Helik, who has been very good today, clears the corner
  • 4:46pm
    Halme on for Woodrow
  • 4:46pm
    Five added minutes
  • 4:47pm
    90 Another chance for the Reds as Chaplin scampers into the box on the right side and shoots but Marshall dives to his right to shoot
  • 4:52pm
    FULL-TIME: Derby 0, Barnsley 2. Three wins out of four under Ismael and their first away victory of the Championship season