Republic of Ireland underage international Alex Murphy made his Premier League debut for Newcastle as the Magpies thrashed ten-man Chelsea 4-1 at St James' Park.
The Annaghdown, Co Galway native, who started his career at Galway United before moving to the Magpies last year, has been capped at Under-19 level for the Boys in Green and received his first Under-21 call-up in September.
With injury-hit Newcastle 4-1 up and cruising, the 19-year-old defender was thrust into the fray against a beleagured Chelsea side on 87 minutes.
Eddie Howe's side produced a stunning second-half display after a first half which saw Jamaal Lascelles' error hand Raheem Sterling the chance to cancel out Alexander Isak's opener with a superb free-kick, but the Newcastle skipper gave his side the lead with a bullet header on the hour.
Joelinton then pounced on Thiago Silva's blunder on the day he became the Blues' oldest ever outfield player at 39 years and 64 days.
The excellent Anthony Gordon produced a fine solo effort seven minutes from time to seal a thumping win, the perfect response to the Magpies' 2-0 defeat at Bournemouth before the international break.
That it was achieved without 13 senior players - Joe Willock and Emil Krafth joined the casualty list on the eve of the game.
The vast majority of a crowd of 52,227 left with smiles on their faces, but wondering what team Howe will be able to field at Paris Saint-Germain in the Champions League on Tuesday evening.
Chelsea manager Mauricio Pochettino, who had seen his side score eight goals against Tottenham and Manchester City in their previous two games, looked on as a positive first half dissolved into chaos with full-back Reece James receiving his marching orders late on for two bookable offences.
Newcastle were ahead with 13 minutes gone when Gordon recycled Kieran Trippier's cross beyond the far post and picked out youngster Lewis Miley on the edge of the box via a deft touch from Joelinton.
The 17-year-old slid a neat pass into Isak's feet and the striker turned smartly before firing past goalkeeper Robert Sanchez.
However, the visitors were back in it within 10 minutes when, after Lascelles had been dispossessed inside the visitors' half, Nicolas Jackson played Sterling into the space he had vacated and the winger's run towards goal was halted illegally by Trippier.
Sterling took charge of the resulting free-kick and curled it superbly over the wall and into the net with Pope rooted to the spot - the first league goal he had conceded at St James' in 383 minutes of football.
Pope had to be at his best to turn away Enzo Fernandez's effort after a flowing counter-attack sparked by Conor Gallagher in which James was twice involved and defender Benoit Badiashile headed straight at the keeper from the resulting corner.
But Pope was fortunate to escape when he scuffed a 36th-minute clearance straight to Gallagher and was relieved to see him make equally poor contact with his attempt at goal.
Trippier very nearly matched Sterling's brilliance with 43rd-minute free-kick which rattled the crossbar as a rousing half drew to its conclusion.
The Magpies regained the lead on the hour when Trippier opted to play the latest in a series of free-kicks square to Bruno Guimaraes rather than into the box and he and Joelinton combined to feed Gordon, whose pinpoint cross was headed home by the unmarked Lascelles.
Newcastle increased their lead within two minutes when Silva's miskick presented Joelinton with a chance to run in on goal and smash the ball past the helpless Sanchez.
James' afternoon got worse with 17 minutes remaining when, having earlier been booked for dissent, he received a second yellow card for a foul on Gordon and was dismissed.
Fabian Schar would have made it 4-1 but for a fine one-handed save by Sanchez, but there was nothing the Spain international could do to keep out Gordon's inch-perfect 83rd-minute strike.
Additional reporting: PA
