The versatile centre-back, who also operates as a left full-back, signed on loan from Manchester City in the summer of 2023 after hugely impressive loan spells in the Football League.
Known for marauding up the field and looking to set up goals as much as for his defensive work, the 20-year-old aided the Foxes' successful promotion bid from the Sky Bet Championship.
His first big break in the professional game came during the 2021/22 season when Sunderland called upon his services in their efforts to end their stay in Sky Bet League 1.
The North East outfit, with Doyle making 36 appearances, ended their exile in the third tier via the play-offs. His reward was a move to Coventry City in 2022/23. Managed by former Fox Mark Robins, the Sky Blues mounted what some viewed as an unlikely promotion charge.
Resolute at the back, largely due to the impressive displays of their young Man City loanee, they proved the doubters wrong and made the play-offs before losing out to Luton Town at Wembley.
The Manchester-born defender is one of several bright lights within the Man City academy who previously worked under Enzo Maresca during the Italian's time in the North West and therefore understood his tactics and vision from the off.
With Leicester's sights firmly set on the top tier, they had recruited somewhat of a Football League specialist despite his age and by the end of 2023/24, he had added another promotion to his CV.
Stepping up to the challenge from the first moment of his debut against former side Coventry on the opening day, the England Under-21s international played a further 22 times across all competitions.
Internationally, meanwhile, Doyle displayed his growing talents with three UEFA EURO U21 Championship qualification appearances, and a goal to boot.