Arsenal: Kai Havertz is game-changer to solve main Mikel Arteta problem in trophy hunt
Imperative that Gunners keep him fit for run-in after late Leverkusen rescue act in Champions League
Mikel Arteta explains rare Bukayo Saka substitution decision during Arsenal draw
Arsenal's captain for the night was replaced on the hour mark
Kasper Hjulmand explains touchline exchange with Nicolas Jover and delivers verdict on Arsenal penalty
Arsenal conceded from a set-piece in their last-16 Champions League tie in Leverkusen
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