Robins insisted there had been no contact although referee Grant Hegley clearly did not agree. Robins said: "The disappointment was the sending-off, because that was the pivotal moment. It's dubious whether there was any contact made, but I am told by the referee now that the rule is that it's a trip or an attempt to trip in the penalty area, so I don't know.
"The goalkeeper tells me he didn't make any contact and Peter Lovenkrands confirmed that after the game. He never touched him, but he had to go down."
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With substitute goalkeeper David Preece standing between him and his 11th goal of the season, Lovenkrands calmly converted the penalty, and then made it 2-0 with a deft header three minutes after the restart.
Midfielder Danny Guthrie added a third with a deflected long-range effort after 50 minutes and then claimed his second 19 minutes later with a free-kick which eluded Preece as he anticipated Andy Carroll – who tried to claim it anyway – getting a touch in front of him.
Jonas Gutierrez had blasted home off the underside of the bar and Kevin Nolan made it 6-0 with 19 minutes remaining.
Substitute Daniel Bogdanovic pulled one back seven minutes from time but the leaders might have won even more handsomely.
Newcastle United: Harper, Simpson, Coloccini, Williamson, Jose Enrique (Kadar 33), Pancrate, Guthrie, Nolan (Ryan Taylor 73), Gutierrez, Carroll (Best 72), Lovenkrands. Unused substitutes: Krul, Hall, Butt, Ranger.
Barnsley: Steele, Hassell, Foster, Shotton, Dickinson, Teixeira, Colace, Doyle, Hallfredsson (Macken 63), De Silva (Preece 42), Gray (Bogdanovic 63). Unused substitutes: Moore, Hume, Potter, Hammill.
Referee: G Hegley (Hertfordshire).
Man of the match: Jonas Gutierrez.
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