[1] Gray made his ATP main draw debut at the 2019 Hall of Fame Open after receiving a wildcard for the singles tournament.

[citation needed] He received a wildcard for the main draw of the 2021 Wimbledon Championships men’s doubles alongside Aidan McHugh, where he recorded his first Major win against Jiří Veselý and Roman Jebavý.

[2] Gray made his Grand Slam tournament debut at the 2022 Wimbledon Championships as a wildcard where he won his first singles match against Tseng Chun-hsin,[3][4] before losing to 11th seed Taylor Fritz in the second round.

[5][6] Gray attended Parkside School, Cobham, his time there overlapping with fellow British tennis player Jack Draper.

The standout feature of his game is a highly effective first serve, the sound of which has been compared to a gunshot.