Arsenal recorded a 3-1 victory over Southampton on Saturday, but it was not the straightforward affair some fans may have been expecting. Southampton took a shock lead in the second half after frustrating the hosts in the first period, but Arsenal fought back with goals from Kai Havertz, Gabriel Martinelli and Bukayo Saka. Mikel Arteta’s side are still unbeaten in all competitions this season, and this strong form comes despite several key injuries, with captain Martin Odegaard and defenders Ben White and Jurrien Timber all currently among the absentees. Arsenal have performed superbly against…