The night before their senior teams compete at the Stadium of Light, Arsenal beat Sunderland 4-0 in Premier League 2.
Stephy Mavididi put Arsenal in front in the Division 1 encounter from the penalty spot at Meadow Park, after Chris Willock was brought down by Joshua Robson on the half-hour.
After the break, Reiss Nelson doubled the Arsenal lead before Kaylen Hinds made it three from close range.
A chip from Sunderland striker Joel Asoro was ruled out for offside, before Willock capped off an impressive display with a brilliant strike into the top corner.
A derby with Tottenham Hotspur awaits Arsenal in Premier League 2 next week, on Friday. Sunderland visit Manchester United on Monday 21 November.