[6] Searle reached the quarterfinals at the 2023 French Open boys singles before losing to eventual winner Dino Prizmic.

[7][8] In July 2023, he defeated the top seed Juan Carlos Prado Ángelo in Boys' singles at the 2023 Wimbledon Championships.

[10][11][12] He defeated American junior Grand Slam winner Cooper Williams in the semifinals, again winning in straight sets.

[18] He made his ATP debut at the Eastbourne International as a lucky loser but lost to Lorenzo Sonego.

[21] Searle reached his first ATP Challenger final at Nottingham in January, losing to Viktor Durasovic in there sets.