Bukayo Saka struggled before Noni Madueke's introduction against Bayer Leverkusen so what's behind the Arsenal forward's dip this season?

It is highly unusual to see Bukayo Saka's number come up as early as the 60th minute, especially in a game in which Arsenal need a goal. And yet it came as little surprise against Bayer Leverkusen. Their captain on the night had struggled.

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