Arsenal might have won their opening game of the season with ease but there are still some areas for improvement it seems. The Gunners effectively cruised to a win over Wolves and probably could have had more goals with some more composure. The strike force of Kai Havertz, Bukayo Saka and Gabriel Martinelli did deliver in the main. Indeed, Saka and Havertz both scored, and assisted as well. READ MORE: Gary O’Neil says he was shocked after seeing what £27m Arsenal player did vs WolvesHowever, it was a trickier day at the office for Martinelli. The pacey forward got into good positions but often…