By Dan King - Newcastle United Digital Editor
At Whitley Park
Newcastle United Under-21s 2 (Armstrong 2)
Leicester City Under-21s 1 (Dawson)
Adam Armstrong's double sent Newcastle into the quarter-finals of the Barclays Under-21 Premier League Cup.
In front of a crowd of 385 which included John Carver, Steve Stone and Club captain Fabricio Coloccini, the England under-17 international scored a goal in each half against a Foxes side who had beaten United in the final of the Citibank Hong Kong Football Club International Soccer Sevens last summer.
The visitors' Michael Cain had the first opening of the game as he shot wide before Gutierrez just failed to connect with an overhead kick after a great run from the exciting Alex Gilliead and a dinked ball from Jonathyn Quinn.
At the other end United were grateful to Jak Alnwick for a simply superb save to deny Cain after a goalmouth scramble then Harry Panayiotou - the player of the tournament in the Far East last May - fired off target before Greg Olley shot wide for United.
Armstrong saw a powerful effort from a narrow angle beaten away by Adam Smith and Leicester finished the half strongly as first Jacob Blyth and then the dangerous Cain came close.
But, after Curtis Good had scooped a clever corner from Armstrong over the bar, Newcastle took the lead six minutes before the break.
Gutierrez picked out Armstrong and the England under-17 international did the rest with a low, hard strike into the bottom corner.
At the beginning of the second half, Gilliead and Armstrong both saw efforts flash just the wrong side of the far post.
Then, after Bigirimana had sent Callum Roberts racing away and the substitute had in turn found Quinn in the box, the Magpies had strong claims for a penalty waved away by referee Glen Hart as the striker appeared to be shoved as he went to shoot.
But Armstrong sealed the win with 12 minutes left as he swept home from Tom Heardman's unselfish pass.
Alnwick made another fine stop late on before Adam Dawson cut inside to pull one back with four minutes left, then goalkeeper Smith headed just wide as he came up for a corner in stoppage time, but Willie Donachie and Peter Beardsley's side marched into the last eight.
Newcastle United Under-21s: Jak Alnwick, Remie Streete (James Morgan 46), Curtis Good, Paul Dummett, Macaulay Gillesphey, Alex Gilliead (Callum Roberts 62), Gael Bigirimana, Greg Olley, Jonas Gutierrez, Adam Armstrong, Jonathyn Quinn (Tom Heardman 74)
Subs not used: Jonathan Mitchell, Olivier Kemen
Leicester City Under-21s: Adam Smith, James Pearson, Callum Elder (George Taft 62), Robert Paratore, Alie Sesay, Kieran Kennedy (Benedict Frempah 84), Joe Dodoo, Michael Cain, Jacob Blyth (Marcel Barrington 62), Harry Panayiotou, Adam Dawson
Subs not used: Liam Sharpe, Jamie Anton