The 20-year-old instead joined Fulham and has now agreed to join Manchester United at the end of the season on a four-year contract.
Maidstone boss Alan Walker told the Sunday People: “Chris was available on a free transfer because he was never under contract with us.
“A lot of clubs showed interest and Chelsea actually had him on trial and he played in a friendly match for them.
“But it was only Middlesbrough and Fulham who made offers to Chris and he chose Fulham.”
