Daniel Marthin (born 31 July 2001) is an Indonesian badminton player affiliated with PB Djarum club since 2015. He was a champion at the 2019 Asian and World Junior Championships in the boys' doubles event. Marthin was part of Indonesia winning team at the 2020 Thomas Cup.
In 2019, Marthin was selected to join the training at the Indonesia National training center. In March, he won a mixed doubles title with Nita Violina Marwah at the Dutch Junior International, and finished as runner-up in the boys' doubles with Leo Rolly Carnando in the German Junior. In May, he and Carnando won the Jaya Raya Junior Grand Prix beating number 1 seed Di Zijian and Wang Chang. The duo also won the Malaysia International Series, and managed to secure the gold medal at the Asian and World Junior Championships. In the team event, he also helps the National team finished as runner-up in Asian Junior and won the Suhandinata Cup after Indonesia juniors defeating China in the final.
In 2021, Marthin started the year as semi-finalists at the Thailand Open with Leo Rolly Carnando. They later stopped in the quarter-finals at the Swiss Open and Spain Masters. They then reached the finals of the Hylo Open, but was defeated by World number 1 Marcus Fernaldi Gideon and Kevin Sanjaya Sukamuljo in straight game. Marthin made his debut with Indonesia team at the 2020 Thomas Cup. He played two matches in the group stage, and the team won the 2020 Thomas Cup.
In February 2022, Marthin participated in 2022 Badminton Asia Team Championships with Indonesia and lost the title to Malaysia. In March, Marthin and Carnando lost in the quarter-finals All England and Swiss Opens. In May, he won a gold medal in the men's doubles with Carnando and a bronze medal in the men's team at the SEA Games. In July, Marthin and Carnando clinched their first World Tour title at the Singapore Open by beating Fajar Alfian and Muhammad Rian Ardianto in the final.
Marthin made his debut at the Asian Championships in Dubai, United Arab Emirates, but he and his partner, Carnando, had to lose in the first round from 2nd seed Malaysian pair Aaron Chia and Soh Wooi Yik. Marthin alongside the Indonesian team competed at the 2023 Sudirman Cup in Suzhou, China. He and his partner played a match in the group stage, lost against Mark Lamsfuß and Marvin Seidel of Germany. Indonesia advanced to the knockout stage but lost at the quarter-finals against China.
Marthin and Carnando has had ups-and-downs on their subsequent tour. The duo reached the semi-finals in the Malaysia Masters, lost in the first round at the Thailand Open, then reached the quarter-finals in the Singapore, and Indonesia Opens. They then experienced four series early rounds exits in the Korea Open, Japan Open, Australian Open, and the BWF World Championships; before reaching the finals in the Hong Kong Open, settled for the runner-up. Marthin made his debut at the Asian Games in Hangzhou, but unable to win any medals in both the men's doubles and team events.
In 2024, after suffered two consecutive first round exits, in the Malaysia and India Opens, Marthin and his partner, Carnando, won their first title of the year and also defend their title in the Indonesia Masters. In August, Marthin made a new partnership with Muhammad Shohibul Fikri. In both of their first tournaments as a new pair, they were able to reach the semi-finals in the Japan and Korea Opens.
In 2025, Daniel continuing his partnership with Fikri and manage to finish as a runner-up to Seo Seung-jae and Jin Yong from Korea in Thailand Masters. They manage to snatch another runner-up spot in Swiss Open, losing to Kittinupong Kedren and Dechapol Puavaranukroh from Thailand.
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| 2021 | Bac Giang Gymnasium, Bắc Giang, Vietnam | Leo Rolly Carnando | Pramudya Kusumawardana Yeremia Rambitan | 21–17, 21–19 | Gold |
| 2019 | Kazan Gymnastics Center, Kazan, Russia | Leo Rolly Carnando | Di Zijian Wang Chang | 21–19, 21–18 | Gold |
| 2019 | Suzhou Olympic Sports Centre, Suzhou, China | Leo Rolly Carnando | Di Zijian Wang Chang | 21–9, 15–21, 21–19 | Gold |
Men's doubles
| 2021 | Hylo Open | Super 500 | Leo Rolly Carnando | Marcus Fernaldi Gideon Kevin Sanjaya Sukamuljo | 14–21, 19–21 | Runner-up | |
| 2022 | Singapore Open | Super 500 | Leo Rolly Carnando | Fajar Alfian Muhammad Rian Ardianto | 9–21, 21–14, 21–16 | Winner | |
| 2023 | Indonesia Masters | Super 500 | Leo Rolly Carnando | He Jiting Zhou Haodong | 21–17, 21–16 | Winner | |
| 2023 | Thailand Masters | Super 300 | Leo Rolly Carnando | Su Ching-heng Ye Hong-wei | 21–16, 21–17 | Winner | |
| 2023 | Hong Kong Open | Super 500 | Leo Rolly Carnando | Kim Astrup Anders Skaarup Rasmussen | 10–21, 24–22, 19–21 | Runner-up | |
| 2024 | Indonesia Masters | Super 500 | Leo Rolly Carnando | Kim Astrup Anders Skaarup Rasmussen | 21–12, 20–22, 21–11 | Winner | |
| 2025 | Thailand Masters | Super 300 | Muhammad Shohibul Fikri | Jin Yong Seo Seung-jae | 18–21, 17–21 | Runner-up | |
| 2025 | Swiss Open | Super 300 | Muhammad Shohibul Fikri | Kittinupong Kedren Dechapol Puavaranukroh | 15–21, 21–18, 14–21 | Runner-up |
| 2018 | Bangladesh International | Leo Rolly Carnando | Supak Jomkoh Wachirawit Sothon | 21–16, 21–11 | Winner | |
| 2018 | Turkey International | Leo Rolly Carnando | Peter Briggs Gregory Mairs | 21–14, 13–21, 23–21 | Winner | |
| 2019 | Malaysia International | Leo Rolly Carnando | Low Hang Yee Ng Eng Cheong | 17–21, 21–17, 21–11 | Winner |
| 2018 | India Junior International | Leo Rolly Carnando | Pramudya Kusumawardana Ghifari Anandaffa Prihardika | 21–12, 21–14 | Winner | |
| 2018 | Malaysia International Junior Open | Leo Rolly Carnando | Rehan Naufal Kusharjanto Pramudya Kusumawardana | 21–17, 21–12 | Winner | |
| 2019 | German Junior International | Leo Rolly Carnando | Di Zijian Wang Chang | 17–21, 13–21 | Runner-up | |
| 2019 | Jaya Raya Junior International | Leo Rolly Carnando | Di Zijian Wang Chang | 21–15, 21–14 | Winner |
Mixed doubles
| 2019 | Dutch Junior International | Nita Violina Marwah | Feng Yanzhe Lin Fangling | 21–16, 21–16 | Winner |
| Asian Junior Championships | B | S | |
| World Junior Championships | B | G |
| SEA Games | NH | B | NH | A | NH | ||
| Asia Team Championships | A | NH | S | NH | QF | NH | |
| Asia Mixed Team Championships | NH | A | NH | G | |||
| Asian Games | NH | QF | NH | ||||
| Thomas Cup | G | NH | A | NH | S | NH | |
| Sudirman Cup | NH | A | NH | QF | NH | B | |
| Asian Junior Championships | 1R | G | |
| World Junior Championships | 4R | G |
| SEA Games | G | NH | A | NH | ||
| Asian Championships | NH | A | 1R | 1R | QF | |
| Asian Games | NH | 2R | NH | |||
| World Championships | 3R | NH | ||||
| Malaysia Open | A | NH | A | 2R | 1R | A | 2R ('23) | |||
| India Open | A | NH | A | 1R | 1R | A | 1R ('23, '24) | |||
| Indonesia Masters | A | 1R | 2R | W | W | 2R | W ('23, '24) | |||
| Thailand Masters | A | 2R | NH | W | 2R | F | W ('23) | |||
| Orléans Masters | A | NH | A | SF | A | SF ('23) | ||||
| All England Open | A | QF | QF | 1R | 2R | QF ('22, '23) | ||||
| Swiss Open | A | NH | QF | QF | 1R | SF | F | F ('25) | ||
| Spain Masters | A | 1R | QF | NH | 1R | A | NH | QF ('21) | ||
| Taipei Open | A | NH | A | — | ||||||
| Thailand Open | A | SF | NH | A | 1R | 1R | A | SF ('20) | ||
| 2R | ||||||||||
| Malaysia Masters | A | NH | A | SF | A | SF ('23) | ||||
| Singapore Open | A | NH | W | QF | 1R | A | W ('22) | |||
| Indonesia Open | A | NH | 1R | 2R | QF | 2R | A | QF ('23) | ||
| Japan Open | A | NH | 2R | 1R | SF | A | SF ('24) | |||
| China Open | A | NH | 1R | SF | A | SF ('24) | ||||
| Macau Open | A | NH | 2R | A | 2R ('24) | |||||
| Hong Kong Open | A | NH | F | QF | A | F ('23) | ||||
| China Masters | A | NH | QF | 1R | A | QF ('23) | ||||
| Indonesia Masters Super 100 | Q2 | A | NH | A | Q2 ('18) | |||||
| Korea Open | A | NH | 2R | 1R | SF | A | SF ('24) | |||
| Denmark Open | A | 1R | QF | 1R | A | QF ('22) | ||||
| French Open | A | NH | 1R | 2R | 2R | 1R | A | 2R ('22, '23) | ||
| Hylo Open | A | F | 2R | A | F ('21) | |||||
| Korea Masters | A | NH | 1R | A | 2R | A | 2R ('24) | |||
| Japan Masters | NH | 1R | QF | A | QF ('24) | |||||
| Australian Open | A | NH | A | 2R | A | 2R ('23) | ||||
| Akita Masters | A | QF | NH | QF ('19) | ||||||
| Year-end ranking | 177 | 84 | 70 | 28 | 15 | 11 | 25 | 39 | 9 | |
| Indonesia Masters Super 100 | 1R | 1R ('18) |
| Year-end ranking | 263 | 145 |
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