Fletcher, and his twin brother Jack, were part of the academy at
Manchester City for nine years prior to agreeing to sign for
Manchester United for a combined fee of £1.25 million in July 2023. He signed his first professional contract with the club in April 2024 shortly after his 17th birthday. Fletcher made his
Premier League debut as a second half substitute in a 2-0 home win against
Tottenham Hotspur on 7 February 2026. With his brother Jack also making his debut for the club that season, it marked the first time that two twins and their father had all played in the English top flight. ==International career==