By Dan King - Newcastle United Digital Editor
At the iPro Stadium
Derby County Under-18s 0
Newcastle United Under-18s 1 (Armstrong)
Adam Armstrong's fourth FA Youth Cup goal of the campaign put Newcastle through to the quarter-finals with a narrow victory over Derby.
Dave Watson's side won for the eighth game in a row in all competitions and will face Cardiff City or Chelsea in the last eight, but were made to work for their latest victory by the Rams.
There were no clear cut chances in the first half, which was marred by a clash of heads between Olivier Kemen and Mason Bennett which saw the Derby man stretchered off.
Jamie Hanson's free kick went wide for the hosts while Jamie Sterry had a shot deflected just wide but the game opened up after the break.
At the beginning of the second half, Max Lowe's flick from Matteo Capitani's low cross was well held by Freddie Woodman.
Then Sterry found Armstrong, who turned and shot from the edge of the box but saw his effort roll wide.
And, after Kemen shrugged off Callum Guy and found Alex Gilliead, the skipper played in Rolando Aarons whose strike was held low to his right by Erik Behrens.
Quinn then lobbed over the bar after good work from Gilliead as Newcastle continued their strong start to the second period.
But Charles Vernam should have done better than drag wide for the Rams after a positive run from the substitute.
On the hour, United took the lead as Woodman's long kick fell to Armstrong, who dummied past Ferrend Rawson and finished superbly as he continued his record of scoring in all three of Newcastle's matches in the competition.
Then Gilliead was denied by a fine Behrens save as the keeper tipped his curling effort over the bar.
Kemen burst through the middle but then shot weakly wide before Greg Olley fired narrowly off target.
Another great piece of skill from Armstrong almost led to a second but his shot was deflected over then, in the 79th minute, Quinn thought his route to goal had been blocked by the hand of Hanson but referee Jason Whiteley waved away his appeals.
With eight minutes left, Woodman made a superb save from substitute Offrande Zanzala's looping header.
Then the Magpies keeper somehow stopped the Rams from equalising following a goalmouth scramble.
And Derby's last chance was squandered as Zanzala blazed over from eight yards out.
Derby County Under-18s: Erik Behrens, Joshua Nash, Samuel Dryden, Callum Guy, Jamie Hanson, Farrend Rawson, Kurtis Revan, Max Lowe, Kwame Thomas, Matteo Capitani (Offrande Zanzala 77), Mason Bennett (Charles Vernam 10)
Subs not used: Jakub Spiriak, Tom Rigby, Mohammed Adams
Newcastle United Under-18s: Freddie Woodman, Jamie Sterry, Lubo Satka, Ryan McKinnon, Ben Drennan, Alex Gilliead, Olivier Kemen, Greg Olley, Rolando Aarons, Jonathyn Quinn, Adam Armstrong
Subs not used: Brendan Pearson, Liam Gibson, Liam Smith, Callum Roberts, Tom Heardman
Photograph courtesy of Andy Clarke, Derby County Football Club