Debutants Gabriel and Willian impressed as Arsenal blew away promoted Fulham in the opening game of the Premier League season.
Former Chelsea winger Willian had a hand in all three goals and Gabriel – a £23m signing from Lille – scored in his first game in English football.
Arsenal were highly impressive, while Fulham caused themselves too many problems at the back.
Both sides have played and won at Wembley – twice for the Gunners – in the 48 days since the last Premier League season finished.
Alexandre Lacazette scored the opener from close range after Willian’s effort was saved.
Centre-back Gabriel then scored from Willian’s corner with his shoulder. Willian, who also hit a post from a free-kick, picked out Pierre-Emerick Aubamayeng with a perfect cross-field ball and the captain curled home Arsenal’s third.
Arteta admitted he was surprised at how well Gabriel played on his first game since March when Ligue 1 was curtailed.
“He hadn’t played any football for six months so to come and play a game in the Premier League after training with the team for three or four days is a big task,” he told BBC Sport.
“The boy showed a lot of character and what he can do. He can still improve a lot but he had a really good game.
“Willian knows the league, the country and is very settled here so I knew his performance would settle straight away.”
Fulham created few chances, with last season’s top scorer Aleksandar Mitrovic coming on with only 27 minutes to go and forcing Bernd Leno into a save.