4. Is Hector Bellerin the answer at right back?
Bellerin missed the season opener against West Ham due to injury, with Mathieu Debuchy stepping in to replace him in the 2-0 defeat.
The Spaniard emerged as a big part of Arsenal’s success last season, but an injury or a loss of form would arguably leave Wenger in a spot of bother. While he has options to cover him, there are still holes in this squad that could become a problem.