The Reds actually moved into the top six with the 3-1 win at QPR, a sixth win on the spin, but Bournemouth’s victory over Bristol City later in the evening saw them retake sixth spot.
Nevertheless it was another impressive victory bfor buoyant Barnsley.
Charlie Austin’s equaliser cancelled out Daryl Dike’s opener but Alex Mowatt’s free-kick and Carlton Morris’ second-half goal gave the visitors the points.
“I think it was a great performance from the guys,” said Ismael, whose Tykes have won six in a row in the second tier for the first time in 100 years.
“It was one of the first times this season that we had a two-goal lead to manage and I think we did it well.
“Alex Mowatt was fantastic. He’s playing at a high level and he’s a great example for the young guys.
“We’re just focused on ourselves and the next game. We want to keep the pressure up on our opponents.”
Barnsley are now unbeaten in eight matches.
Dike put the Tykes ahead by holding off Lee Wallace to head in Mowatt’s 23rd-minute corner at the near post - the American striker’s second goal since signing on loan from Orlando City at the start of last month.
Rangers hit back four minutes later with Austin’s fifth goal in 10 appearances since his return for a second spell at the club.
Ilias Chair’s lofted free-kick reached Yoann Barbet, whose left-footed volley was parried by keeper Brad Collins to Austin and the on-loan West Brom striker finished emphatically.
But Barnsley quickly regained the lead with a fabulous goal from Mowatt, who clipped his 25-yard free-kick beyond keeper Seny Dieng and into the top corner of the net.
And Morris doubled that lead 12 minutes into the second half, straight after coming on as a substitute.
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