Tomato Ho joined the PSA back in 2015, and has gone on to become the Hong Kong No.1, and broke into the world's top 25 for the first time early in 2023.

Hong Kong’s Ho finished runner-up to Ka Yi Lee in 2015 at the Macau Open and then runner-up at the Malaysian Squash Tour I the following year to Sivasangari Subramaniam over three games.

More semi-final finishes followed and saw her rise up the world rankings and into the world’s top 50 for the first time in her career in 2016. Ho then claimed her maiden title at the Sandgate Open where she saw off compatriot Vanessa Chu to break her tour-title duck. Ho then faced Chu once more in the Perrier Challenge Cup when she beat her once again over three games to secure back-to-back titles.

Her third win that year came at the City of Greater Bendigo International, where she beat Liu Tsz-Ling, a month after losing to the same opponent in the semi finals of the Victorian Open. A string of quarter final appearances followed. Ho made the last eight of the HKFC International, Queensland Open, Winnipeg Winter Club Women’s Open and Malaysian Squash Tour IV Open.

Her next final came in the Context Challenge Cup in 2018, where she lost to a familiar foe, in Vanessa Chu. Semi final appearances also came at the CAC Squash Open and JC Women’s Open for Ho.

After a series of premature exits in the latter of half of the 2018-2019 campaign, Tze-Lok bounced back to win her first tournament of the new season, as she downed Sarah Cardwell in the final of the City of Greater Bendigo International. She then made it to the last 16 of the HKFC PSA International on home soil, before also reaching the second round of the PSA Women’s World Championships in front of the Pyramids.

Following the return of the Tour after its enforced six-month suspension due to the COVID-19 pandemic, Ho, along with many other Hongkongers on Tour, only featured in events on home soil for a period of time. In three Challenger Tour events in early 2021, she made the final of the Chairman Cup, along with a semi-final appearance at the Hong Kong Football Club PSA.

After reaching the last 32 of both the PSA World Championships 2020-2022 and the U.S. Open presented by Truist, Ho returned to the Challenger Tour, and made the quarter finals of the Capra Baerum Open in Norway. After a semi-final appearance at the London Open, she then also made the last eight of the Bronze level Malaysian Open Squash Championships to breach the world’s top 40 for the first time in her career.

Ho started 2022 by making the final of the Equinox Women’s Boston Open, before then reaching the semi-finals of the E.M. Noll Classic. She then claimed another Tour title, beating compatriot Chan Sin Yuk in the final of the Calgary CFO Consulting Services Women’s Squash Week.

Last 16 appearances also came at the Manchester Open and the Barfoot & Thompson New Zealand Open over the rest of the year, while she was also a fixture of the Hong Kong team that won the Asian Team Championships in South Korea in November.

The Hongkonger started 2023 strongly, reaching the third round of the J.P. Morgan Tournament of Champions, before them making the semis of the Cleveland Classic. Those results pushed her into the world’s top 25 for the first time in March. She also made the semis of the Calgary CFO Consulting Services Women’s Squash Week, before another major third round appearance, coming at the British Open.