“He had a slight problem in his bone,” confirmed Arteta. “Hopefully he will start to train in the next week or so.”

Despite some players not being able to take part, Arteta is pleased with the way pre-season training has been going so far. The Gunners started at London Colney, spent time in Germany and then flew to the USA earlier this week.

“The development has been really good,” he told Arsenal.com.

“Honestly, the way they’ve been training has been phenomenal – the best since I’ve been here. The togetherness around the group, the quality that they’ve shown, the intensity in how they train. They are different standards.”