# Ong Yew Sin

Ong Yew Sin (born 30 January 1995) is a Malaysian badminton player. He won a silver medal with Teo Ee Yi at the 2023 Badminton Asia Championships and a bronze medal with Teo at the 2021 BWF World Championships.

## Career

Together with Teo Ee Yi, they won the 2016 Bitburger Open and earned a silver and a bronze medal at the 2017 and 2019 SEA Games respectively. They were also runners-up at the 2019 Malaysia Masters.
In January 2020, they were dropped from the national team by the Badminton Association of Malaysia. Following the incident, they went on to win their first World Tour title at the 2020 Thailand Masters. They were also semifinalists at the 2021 Indonesia Masters and the 2021 BWF World Tour Finals.
Their best achievement was winning the men's doubles silver medal at the 2023 Badminton Asia Championships after narrowly losing to Satwiksairaj Rankireddy and Chirag Shetty with a score of 21–16, 17–21, 19–21 in 66 minutes. They won a men's doubles bronze medal at the 2021 BWF World Championships, where they had to go through a narrow fight against Olympic champions Lee Yang and Wang Chi-lin in the quarterfinals. Because of their achievements, they were selected to be part of the Malaysian squad in the 2022 Thomas Cup.

## Achievements
### BWF World Championships

Men's doubles
| Year | Venue | Partner | Opponent | Score | Result |
| 2021 | Palacio de los Deportes Carolina Marín, Huelva, Spain | Teo Ee Yi | Takuro Hoki Yugo Kobayashi | 13–21, 9–21 | Bronze |

### Asian Championships

Men's doubles
| Year | Venue | Partner | Opponent | Score | Result |
| 2023 | Sheikh Rashid Bin Hamdan Indoor Hall, Dubai, United Arab Emirates | Teo Ee Yi | Satwiksairaj Rankireddy Chirag Shetty | 21–16, 17–21, 19–21 | Silver |

### SEA Games

Men's doubles
| Year | Venue | Partner | Opponent | Score | Result |
| 2017 | Axiata Arena, Kuala Lumpur, Malaysia | Teo Ee Yi | Kittinupong Kedren Dechapol Puavaranukroh | 19–21, 22–20, 17–21 | Silver |
| 2019 | Muntinlupa Sports Complex, Metro Manila, Philippines | Teo Ee Yi | Bodin Isara Maneepong Jongjit | 12–21, 21–16, 19–21 | Bronze |

### BWF World Tour (1 title, 2 runners-up)

The BWF World Tour, which was announced on 19 March 2017 and implemented in 2018, is a series of elite badminton tournaments sanctioned by the Badminton World Federation (BWF). The BWF World Tours are divided into levels of World Tour Finals, Super 1000, Super 750, Super 500, Super 300 (part of the HSBC World Tour), and the BWF Tour Super 100.
Men's doubles
| Year | Tournament | Level | Partner | Opponent | Score | Result |
| 2019 | Malaysia Masters | Super 500 | Teo Ee Yi | Marcus Fernaldi Gideon Kevin Sanjaya Sukamuljo | 15–21, 16–21 | Runner-up |
| 2020 | Thailand Masters | Super 300 | Teo Ee Yi | Huang Kaixiang Liu Cheng | 18–21, 21–17, 21–17 | Winner |
| 2022 | Australian Open | Super 300 | Teo Ee Yi | Liu Yuchen Ou Xuanyi | 16–21, 20–22 | Runner-up |

### BWF Grand Prix (1 title, 1 runner-up)

The BWF Grand Prix had two levels, the Grand Prix and Grand Prix Gold. It was a series of badminton tournaments sanctioned by the Badminton World Federation (BWF) and played between 2007 and 2017.
Men's doubles
| Year | Tournament | Partner | Opponent | Score | Result |
| 2016 | Bitburger Open | Teo Ee Yi | Michael Fuchs Johannes Schöttler | 21–16, 21–18 | Winner |
| 2017 | New Zealand Open | Teo Ee Yi | Chen Hung-ling Wang Chi-lin | 16–21, 18–21 | Runner-up |
    BWF Grand Prix Gold tournament
    BWF Grand Prix tournament

### BWF International Challenge/Series (5 titles, 1 runner-up)

Men's doubles
| Year | Tournament | Partner | Opponent | Score | Result |
| 2014 | Vietnam International Series | Low Juan Shen | Jagdish Singh Roni Tan Wee Long | 21–19, 21–13 | Winner |
| 2014 | Bangladesh International | Low Juan Shen | Darren Isaac Devadass Tai An Khang | 19–21, 21–8, 21–13 | Winner |
| 2016 | Portugal International | Teo Ee Yi | Đỗ Tuấn Đức Phạm Hồng Nam | 21–17, 24–22 | Winner |
| 2016 | Romanian International | Teo Ee Yi | Zvonimir Đurkinjak Zvonimir Hölbling | 21–13, 21–9 | Winner |
| 2016 | Vietnam International | Teo Ee Yi | Kenya Mitsuhashi Yuta Watanabe | 21–19, 21–14 | Winner |
Mixed doubles
| Year | Tournament | Partner | Opponent | Score | Result |
| 2016 | Romanian International | Peck Yen Wei | Wong Fai Yin Shevon Jemie Lai | 15–21, 17–21 | Runner-up |
    BWF International Challenge tournament
    BWF International Series tournament