Arsenal are in the Champions League knockout stages for the first time since 2017, and given their strong performances in recent weeks, will be backing themselves to go further in the competition. Two-time winners FC Porto await them in the round of 16, but Mikel Arteta’s team will hope to continue their excellent form as they travel to Portugal next week for the first leg. If Arsenal do get past Porto, they will be a team that most of Europe will not want to face, but will also be looking at the likes of Real Madrid and Manchester City as teams to avoid in the next stages. Club legend Thierry…