Afterwards, Arsenal boss Mikel Arteta insisted his side needed more from the experienced players such as Willian.
“It’s the first Premier League goal for Emile,” Arteta told BT Sport. “So we are demanding him standards here.
“He’s playing at a top club and because he’s done well, when we look at those demands he hasn’t done that enough and we cannot pull those demands.
“Willi [Willian] we have to, because he’s done it in the past and we have to demand it much more.