Miguel Almiron was denied a dream home debut by the woodwork as Newcastle eased their relegation fears by nudging 10-man Huddersfield closer to the Premier League exit.
The Magpies' new record signing saw his cheeky lofted effort come back off the post as he attempted to round off a sumptuous counter-attack, but nevertheless made a significant impression in front of a crowd of 52,174 at St James' Park.
A 2-0 victory was ultimately secured by goals from Salomon Rondon and Ayoze Perez inside the opening seven minutes of the second half with the home side having spent much of the first hammering away at Jonas Lossl's goal as the visitors attempted to re-group following skipper Tommy Smith's 20th-minute dismissal.
Newcastle threatened throughout the first half, with Huddersfield holding them at bay, but their resolve was broken within seconds of the restart.
DeAndre Yedlin controlled Florian Lejeune's deep cross and Perez and Hayden helped the ball on to Rondon, who blasted home right-footed on the turn to break the deadlock.
Newcastle extended their lead six minutes later when Perez beat Lossl from Rondon's knock-down to leave the visitors in deep trouble.
In a game of three fiercely-contested penalties, Joshua King scored one and missed another as Bournemouth drew 1-1 with Wolverhampton Wanderers who also netted from the spot.
For all Bournemouth's poor away form, they have not lost in the league to anyone outside the top six at Vitality Stadium this season and took the lead on 16 minutes, although Wolves claimed King went down under minimal contact from Joao Moutinho.
Wolves were further incensed moments later when referee Roger East turned down their own appeals for a penalty after Chris Mepham headed on to his own arm.
But they were eventually awarded a spot-kick when the referee penalised Adam Smith for a foul on Matt Doherty. Raul Jimenez fired home but within minutes King had another chance from the spot even though Ryan Fraser appeared to be fouled by Ivan Cavaleiro outside the area.
This time King hit the post and Bournemouth also went close through Jordan Ibe, who crashed a shot against the bar, and Dominic Solanke, who should have done better when free on goal.
Crystal Palace piled further pressure on Leicester City manager Claude Puel on Saturday with a comprehensive 4-1 Premier League win over his team, who have now gone seven games without a victory.
Two goals from Wilfried Zaha, another from Michy Batshuayi and a penalty from Luka Milivojevic secured the win to delight 71-year-old Roy Hodgson as he officially became the oldest ever Premier League manager.
Leicester conceded the first goal for the 19th time this season when Batshuayi was hit by James McArthur's shot, the ball ricocheting past Kasper Schmeichel at great pace. It was the Belgian's first Premier League goal in 19 months.
Although Evans responded with his first goal for Leicester after 64 minutes, Palace quickly restored their lead through Zaha, who was returning from suspension.
Milivojevic put the game beyond doubt with a spot kick after 81 minutes and Zaha added his second goal, and Palace's fourth, late on after a mistake from Schmeichel.
The win put Palace six points clear of the relegation zone as they moved up one place and two points behind 12th-placed Leicester.