Arsenal boss Mikel Arteta has challenged Willian after he scored in victory over West Brom.

Making his 37th appearance for the Gunners, the Brazilian curled a free kick beyond Sam Johnstone to ensure his side earned all three points Sunday night.

"Willi, we have to [demand high standards] because he's done it in the past and we have to demand it much more," the Gunners boss told BT Sport.

Arteta added: "Willian has done it in the past. That's the big difference.

"He's done it for many years and achieved big things in the game. Somehow this season we haven't managed to get the best out of him.

"It's true that he had some spells that we could see highlights of things he can do and today was a good example of that."