2022: Maiden Challenger doubles title Harris won his first
ATP Challenger doubles title at the
Winnipeg National Bank Challenger playing with
Kelsey Stevenson, defeating
Max Schnur and
John-Patrick Smith in the final.
2023: ATP debut and first win Harris reached his first singles Challenger final at the inaugural edition of the
Challenger Club Els Gorchs in Las Franquesas del Valles, Spain, as a qualifier where he lost to second seed
Hugo Grenier. He made his
ATP Tour debut at the
Sofia Open, where as a qualifier, he defeated defending champion
Marc-Andrea Huesler in the first round, before losing his next match to third seed
Jan-Lennard Struff.
2024: Wimbledon, Davis Cup and Masters debuts Given a wildcard entry into the
Surbiton Trophy, Harris made it through to the semifinals with wins over eighth seed
Juncheng shang, qualifier
Tristan Schoolkate and
Mikhail Kukushkin. His run was ended in the last four by eventual champion
Lloyd Harris. Entering as an alternate at the
Nottingham Open Challenger, he overcame
Coleman Wong,
João Fonseca, and Mikhail Kukushkin to reach the semifinals, where he lost to qualifier
Charles Broom. Ranked No. 162, Harris received a wildcard for the main draw at
Queen's Club and reached his first ATP Tour quarterfinal. En route, he defeated
Tomás Martín Etcheverry and qualifier
Giovanni Mpetshi Perricard. Despite losing in the last eight to
Lorenzo Musetti, he broke into the top 150 in the rankings on 24 June 2024. His good form continued at the next grass court tournament, the
Eastbourne International, recording wins over fellow wildcard
Jacob Fearnley, lucky loser Charles Broom and
Flavio Cobolli to make it through to his first ATP Tour semifinal, and as a result, reached the top 125 in the singles rankings. He lost to
Max Purcell in three sets. For his Grand Slam tournament debut, he received a wildcard for
Wimbledon. Harris lost in the first round to Spain's
Jaume Munar. He qualified for the main draw at the
Hall of Fame Open in
Newport, Rhode Island, going on to defeat
Gabriel Diallo in the first round. He lost his next match to
Mackenzie McDonald. Harris made his debut for the
Great Britain Davis Cup Team against Finland in
Manchester in September, defeating
Otto Virtanen in straight sets.
2025: First Challenger singles title and major win Harris started his 2025 season representing Great Britain at the
United Cup in Australia, where he lost all three of his matches to
Tomás Martín Etcheverry,
Alex de Minaur and
Hubert Hurkacz. Wins over
Yuta Shimizu and
Carlos Taberner saw him reach the final round of qualifying at the
Australian Open for the first time, but a defeat to
Kamil Majchrzak meant he missed out on a place in the main-draw. He represented Great Britain in their
Davis Cup qualifier against
Japan, but was beaten in both his matches against
Yoshihito Nishioka and
Kei Nishikori as the team lost the tie 3-2. In February, Harris made it through to the semifinals at the
Chennai Open Challenger, where his run was ended by
Elias Ymer. The following week he defeated Eric Vanshelboim,
James McCabe, Elias Ymer and Tristan Schoolkate to reach his second Challenger final at the
Delhi Open, where he lost to
Kyrian Jacquet. Completing a successful three weeks in India, Harris got to the semifinals at the
Bengaluru Open Challenger, before losing to
Brandon Holt. The following month, Harris qualified in
Miami making his debut at the tournament. He lost to wildcard entrant
Eliot Spizzirri in the first round. In June, he gained entry into the main-draw at the
Eastbourne Open as a lucky loser and defeated fellow Briton
Cameron Norrie and qualifier
Mattia Bellucci to reach back-to-back quarterfinals at the tournament. Harris lost his last eight match to fourth seed
Ugo Humbert. The following week at
Wimbledon he won his first match at a major, defeating
Dušan Lajović in straight sets to reach the second round, where he lost to
Nuno Borges. Harris qualified for the
Washington Open, but lost to Cameron Norrie in the first round. Despite being defeated by
Coleman Wong in the final round of
qualifying at the
US Open, he made his main-draw debut at the event after being awarded a lucky loser place. Harris was unable to make the most of his reprieve, losing in the first round to 25th seed
Félix Auger-Aliassime in straight sets. In September, Harris won his first ATP Challenger singles title at the
Cassis Open Provence, defeating
Daniil Glinka in the final. ==Performance timeline==