BRADFORD CITY 0 NEWCASTLE 4
Jacob Murphy opened his Newcastle United account as Rafa Benitez's side found their stride at Valley Parade on Wednesday.
The winger, signed from Norwich City last week, scored twice in the club's convincing 4-0 win over League One club Bradford City.
Dwight Gayle and Aleksandar Mitrovic also netted in the friendly.
The game also saw Matt Ritchie make his first appearance of pre-season following his surgery at the end of last season.
Newcastle, and Jonjo Shelvey especially, dominated the first half, but they couldn't find the net.
Bradford goalkeeper Colin Doyle made a series of saves, and Ritchie his the crossbar with a cross.
United manager Benitez sent on Murphy, Javier Manquillo and Mohamed Diame for the second half, and Newcastle quickly got themselves ahead.
Gayle opened the scoring in the 50th minute from a low Christian Atsu cross. Doyle got a hand to his shot, but the ball rolled over the line.
The striker then turned provider for Murphy, who stepped into space and beat Doyle with a neat finish.
Substitute Mitrovic, handed the captain's armband by Shelvey as he left the field, made it 3-0 with a simple tap-in after Aarons crossed to him.
And Murphy capped a memorable night with a United's fourth.
The £12million signing netted with a half-volley after a cross was only cleared as far as him.
BRADFORD CITY: Doyle, McMahon, Knight-Percival, Kilgallon, Chicksen, Gilliead, Vincelot, Reeves, Law, McCartan, Jones.
NEWCASTLE UNITED: Elliot (Woodman, 61), Yedlin (Manquillo, 46), Lejeune (Mbemba, 61), Clark (Saivet, 77), Dummett (Gamez, 61), Atsu (De Jong, 61), Shelvey (Aarons, 61), Hayden (Colback, 77), Ritchie (Murphy, 46), Perez (Diame, 46), Gayle (Mitrovic, 61).
PRE-SEASON
BRADFORD CITY 0 NEWCASTLE 4 (Gayle, Murphy 2, Mitrovic)
Elliot (Woodman, 61), Yedlin (Manquillo, 46), Lejeune (Mbemba, 61), Clark (Saivet, 77), Dummett (Gamez, 61), Atsu (De Jong, 61), Shelvey (Aarons, 61), Hayden (Colback, 77), Ritchie (Murphy, 46), Perez (Diame, 46), Gayle (Mitrovic, 61).
PRESTON 1 NEWCASTLE 1 (Mitrovic)
Elliot (Darlow, 46, Woodman, 70), Mbemba, Hanley (Yedlin, 46), Lejeune (Manquillo, 77), Dummett (Clark, 46), Atsu (Murphy, 46), Diame (Colback, 46), Shelvey (Hayden, 46), Aarons (Perez, 46), de Jong (Roberts, 62), Mitrovic (Gayle, 46).
HEARTS 1 NEWCASTLE 2 (Gayle 2)
Elliot (Woodman 63), Aarons(Gamez 46), Clark (Dummett 46), Mbemba (Hanley 62), Lascelles (Lejeune 46), Haidara (Colback 62), Shelvey (Saivet 46), Diame (Armstrong 62), De Jong (Lazaar 75), Atsu (Perez 46), Gayle (Mitrovic 46)