Arsenal provided a fine performance at the Emirates as they put four past Standard Liege without reply.
The Gunners’ task was made easier after Gabriel Martinelli scored twice in the opening 15 minutes.
The summer signing scored two against Nottingham Forest in the Carabao Cup last month.
And team-mate Hector Bellerin admits the 18-year-old has been working hard in training and listening to Unai Emery’s demands.
“He has been a player, he keeps his head down, he works really hard, he is doing what the coach wants him to do and it shows on the pitch,” he told reporters.
“Everyone is really pleased for him.”
Martinelli has been talked up by fans and pundits alike.
And former Premier League striker Michael Owen was full of praise for the youngster.
“Looks like a talent, yeah,” he said on BT Sport.
“We’ve seen goals and three of them in the first half, which is fantastic. I really like this lad.
“The ball has almost been prepared out wide and he’s there, he’s wanting to sort of get involved, which is good.
“Once he realises it’s about to come in, his shirt in focus to get back into the box is brilliant.”
Bellerin also had a good game, in his second outing since returning from a long knee injury.
“It’s one of the best feelings to be back, it has made me more mature, it has made me a better player I am so thankful for everyone around me, they have made it easier for me and I am now happy to be back playing football,” he said.
“The team had a great performance. It’s a very important win for us.
“We played 100 per cent and wanted to get more goals.
“We wanted to press, the team is hungry, the team wants to win and wants to improve and I am very pleased for the boys.”