Hayden joined the Gunners' academy as a teenager after impressing in a match against Arsenal, while playing for Southend United.
The choice between Arsenal and Manchester United may be difficult for many youngsters, but it was pretty simple for someone who had grew up idolising Patrick Vieira.
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As per the Hull Daily Mail, Hayden said: "I was 14 when I joined Arsenal. I'd been at Southend before from the age of under-10s, we played Arsenal in a friendly at under-13s and they said they'd take me.
"They were my team growing up because my idol was Patrick Vieira. I always watched his game and studied what he did.
"As soon as I got the nod, and the choice between Manchester United and Arsenal, it was an easy decision.
"I said 'Drive me there now!' as soon as I knew they were interested. It felt like a once in a lifetime opportunity. Man United were keen but when you're 13 and living in London with your parents, it was a no brainer."
Now 20, Hayden is forging his reputation in the Championship with Hull, alongside fellow Arsenal loanee Chuba Akpom, as the Tigers aim for an instant return to the Premier League.
Gunners fans got a glimpse of what the England youth player has to offer, after he made two substitute appearances at the Emirates Cup. He also made two appearances in the League Cup over the past two seasons.
The youngster, who has appeared six times for Hull this season, can take inspiration for Francis Coquelin who, at the back end of 2014, was on-loan at Charlton Athletic, before becoming an integral part of Arsenal's squad last season.