Manchester United continued to languish in the bottom half of the Premier League table on Sunday after Newcastle United's Matthew Longstaff enjoyed a dream debut by securing a 1-0 win at St James' Park. The result not only put further pressure on Ole Gunnar Solskjaer's side, it moved Newcastle out of the bottom three. Longstaff, 19, was playing in midfield alongside his older brother Sean. He first clipped the bar in the first-half but made no mistake as he beat David de Gea with a low drive at 72 minutes. United's best chance came when defender Harry Maguire's header from a corner on the stroke of halftime went wide. United enter the international break in 12th position with Newcastle a point behind in 16th. In his 400th game as a Premier League manager, Magpies boss Steve Bruce ended a run of 21 games without a win against the club he served with distinction as a player. United are languishing just two points above the relegation zone after their third successive league game without a win. This was a wretched display from United, especially given the paucity of the opposition provided by a Newcastle team who had fared even worse in the opening weeks of the season. Alarmingly, United's only victory in their last five matches in all competitions came on penalties against minnows Rochdale in the League Cup. United haven't won away from Old Trafford since beating PSG in the Champions League in March. They are winless in eight consecutive top-flight away fixtures for the first time since a run of 11 in 1989. Their haul of nine points after eight games is their worst tally at this stage of a top-flight campaign since 1989. Newcastle's last home game attracted their lowest league attendance for eight years, and their last away game – a 5-0 humiliation at Leicester – ranked as their heaviest defeat in four years. But even at such a low ebb, Newcastle were able to put United on the back foot, with winger Allan Saint-Maximin easing past three defenders before shooting wide from long-range. Newcastle-born Longstaff didn't take long to get into the swing of it on his top-flight debut. It was the 19-year-old midfielder who almost opened the scoring midway through the first half when his dipping volley beat United keeper David de Gea but cannoned back off the crossbar. Fabian Schar headed over from a Sean Longstaff corner as the visitors struggled to find any momentum. Solskjaer's team failed to manage a shot on target against AZ Alkmaar in midweek and it took United until late in the first half to test Newcastle keeper Martin Dubravka through Andreas Pereira's long-range strike. Both sides lacked quality in the final third. Newcastle finally conjured a moment of quality to break the deadlock in the 72nd minute. Saint-Maximin ran unchecked by United from the halfway line before finding Jetro Willems. Willems reversed course to leave Maguire on his backside before teeing up Longstaff for a fierce low drive that flashed past De Gea from 20 yards to leave United in crisis.