Holders Manchester City eased into the semi-finals of the Carabao Cup after a comfortable 4-1 win against struggling Arsenal at the Emirates on Tuesday night.
Arsenal have now suffered their biggest home defeat in a major domestic cup match since losing 5-0 to Chelsea in League Cup 4th round in November 1998.
The Gunners hopes of a fast start to calm their nerves amid a dreadful run were immediately dashed inside three minutes as Man City took the lead through Gabriel Jesus.
Oleksandr Zinchenko found space down the left before whipping in a teasing ball towards the front post.
Jesus somehow ghosted in between the lax marking of Shkodran Mustafi and Gabriel Magalhaes to glance his header inside the far post unmarked.
Against the run of play, Arsenal then secured a lifeline when Alexandre Lacazette made it 1-1 in the 32nd minute after reacting quickly to head home under pressure.
On the stroke of half-time Arsenal were handed a major blow when Man City’s stand-in goalkeeper caught Martinelli in a forceful challenge.
The Brazilian stayed down for several minutes while receiving treatment on his right ankle, but thankfully was able to continue as the interval arrived.
Martinelli lasted just three minutes after the break before succumbing to his injury and was replaced by Nicolas Pepe.
Man City went 2-1 ahead on 55 minutes thanks to Riyad Mahrez who free-kick on the edge of Arsenal’s box slipped through the fingers of Runar Rúnarsson in goal for Arsenal.
Things went from bad to worse moments later when Phil Foden made it 3-1 on 59 minutes with a sublime finish. Replays suggested the young attacker had strayed offside, but without VAR available in the EFL Cup, the goal stood.
And in the 73rd minute Aymeric Laporte then added a fourth after delightful work from Phil Foden to craft a yard of space then cross.