Arsenal boss Mikel Arteta is one of the best managers in the world, but there are things he can improve on too. The Gunners raised a few eyebrows when they decided to hand Arteta the job in 2019. He had no experience as a first-team boss at that point, but he was still tasked to replace Unai Emery. Arteta will be the first one to admit that he has made mistakes along the way, but he has learnt from most of them and has turned Arsenal into one of the best teams in the world. However, there is still one thing that he needs to get better at, and Jamie Carragher has highlighted that in the latest …