Hoon Thien How

Hoon Thien How and Tan Boon Heong were the World Junior Champions in 2004. Their partnership continued until early 2006 when they won the silver medal at the 2006 Asian Badminton Championships. Shortly after, Tan was partnered with Koo Kien Keat and Hoon was briefly partnered with Chan Chong Ming and then, Ong Soon Hock.

Hoon and Ong participated in the 2008 Indonesia Open and reached the semi-finals before being beaten by Candra Wijaya and Tony Gunawan, 25–23, 15–21, 15–21. This was followed by a defeat to second-seeded Cai Yun/Fu Haifeng in the 2008 China Masters 15–21, 21–17, and 20–22.

In 2010, Hoon and Ong were chosen to play for Malaysia Thomas Cup squad. From 2010 onward, he was paired with Tan Wee Kiong. Hoon and Tan broke into the top 10 in the world rankings on 20 December 2012. Together, their highest ranking was at No. 7. Hoon and Tan did not win any Super Series tournaments during their partnership. However, they often made it to the quarterfinals, semifinals or finals of the tournaments which contributed to their world ranking.

In May 2014, Hoon represented Malaysia at 2014 Thomas Cup with former partner, Tan Boon Heong as a scratch pair. They played first doubles and defeated World No. 1 pair, Mohammad Ahsan and Hendra Setiawan of Indonesia in the semi-finals but failed to defeat world No. 3 pair, Hiroyuki Endo and Kenichi Hayakawa of Japan in the finals. Malaysia lost narrowly 2–3 to Japan.

After 8 years since they last played together as official partners, Hoon's partnership with Tan Boon Heong was permanently resumed in September 2014. This was due to the resignation of Boon Heong's partner, Koo Kien Keat earlier that year along with Tan Wee Kiong's new partnership with Goh V Shem.