Arsenal boss Mikel Arteta admits he was delighted with Gabriel Martinelli's form against Barcelona.
The Gunners defeated Barca 5-3 yesterday in their latest preseason fixture in the US.
Martinelli didn't get on the scoresheet but impressed Arteta with his all-round play.
Arteta said: "Gabi didn't score but it was the best Gabi I've seen for months.
"The energy, belief - He was creating a lot of chaos and good moments. He was making everyone better."