By Dan King - Newcastle United Digital Editor
Newcastle United Under-18s 1 (Roberts)
Southampton Under-18s 2 (Barnes, Sims)
After the high of Wednesday's Tyne-Wear derby win over Sunderland, Newcastle's under-18s were brought back down to earth with a 2-1 home defeat to Southampton.
In a game of few chances, perhaps due to a swirling wind over Little Benton, the Saints took theirs to leave Dave Watson's side with three losses from their opening four games this term.
Goalkeeper Yusuf Mersin had kept a clean sheet on his debut against the Black Cats in midweek but was picking the ball out of his net inside the opening two minutes this time as Marcus Barnes swept home after some sloppy defending from United.
But the hosts quickly drew level when Callum Roberts won the ball and burst into the box before wrongfooting Harry Isted to slot into the net.
Left-back Liam Gibson made a good block moments later to maintain parity, then Harley Willard dragged wide for the Saints after a strong run.
Willard thought he'd scored when he tapped home after a good save from Mersin denied Sam Gallagher, but the flag was up against the winger.
And Mersin was again alert shortly before the break to thwart Gallagher for a second time.
However, Southampton took the lead for a second time when Josh Sims was allowed to turn in the box and fire into the bottom corner.
Rolando Aarons squandered United's best chance to equalise as he surged into the penalty area but blazed over the bar.
The Magpies' next Barclays Under-18 Premier League fixture is away to Reading next Saturday.
Newcastle United Under-18s: Yusuf Mersin, Jamie Sterry (Jamie Cobain 14), Liam Gibson, Ben Drennan (Jonathyn Quinn 65), Ryan McKinnon, Kyle Cameron, Alex Gilliead (Greg Olley 46), Jordan Storey, Callum Roberts, Liam Smith, Rolando Aarons
Subs not used: Ben Smith, Macaulay Gillesphey