Arsenal have impressed on their first Champions League campaign since 2016-17, reaching the last 16 as group winners. With the knockout stages of the competition getting under way this week, the Gunners will begin getting a picture of how the tournament is shaping up. Arsenal have to wait until next week before they get their Champions League knockout campaign under way, facing Porto away on Wednesday 21 February. Gunners legend Thierry Henry was in the CBS Sports studio for the first games of the knockout stage as FC Copenhagen hosted Manchester City and RB Leipzig faced Real Madrid. As an Ar…