KIM Won Ho / SEO Seung Jae
Badminton 2026 Results, Match by Match

Daihatsu Japan Open

Super 750・Tokyo Metropolitan Gymnasium

They entered as the top seeds and lost the final. We hold two of their matches here. On 16 July they beat 🇯🇵Kakeru Kumagai and Hiroki Nishi 21-14, 21-18 in 40 minutes, and on 19 July they lost the final to Fajar ALFIAN / Muhammad Shohibul FIKRI (INA, 2nd seeds) 19-21, 17-21 in 45 minutes. ⚠️The official BWF day data has them playing five here; the three we do not hold are the first round, the quarter-final and the semi-final, and they won all three.

China Open

Super 1000・Changzhou, China

They lost a final to the same pair for the second week running. We hold two of their matches here. On 25 July they beat Ben LANE / Sean VENDY (ENG) in the semi-final — our tournament page stops at 2-0 in games, and the official BWF day data gives 21-19, 21-13 in 39 minutes — and on 26 July they lost the final to ALFIAN / FIKRI 21-16, 19-21, 19-21 in 71 minutes. 🔴They took the opening game, then lost the second and the third by two points each. ⚠️The BWF day data again has them playing five here.

BWF World Championships 2026

World Championships・New Delhi, India

They came in as defending champions and top seeds, and the run stopped in the semi-final. We hold three of their matches here. On 18 August they beat 🇯🇵Yuichi Shimogami and Takumi Nomura 21-16, 21-13 in 38 minutes; on 21 August they beat GOH Sze Fei / Nur IZZUDDIN (MAS, 6th seeds) 21-16, 21-16 in 41 minutes — our page had the score but not the opponent, which the BWF day data supplied; and on 22 August they lost the semi-final to Aaron CHIA / SOH Wooi Yik (MAS, 4th seeds) 17-21, 18-21 in 43 minutes. ⏱All four of their matches in New Delhi ended in two games, at 38, 38, 41 and 43 minutes. The longest was the one they lost.

China Masters

Super 750・Shenzhen, China

🔻They entered as the top seeds and lost the first round on 1 September to Leo Rolly CARNANDO / Daniel MARTHIN (INA), 19-21, 19-21 in 42 minutes — two points short in both games. That pair went out in the second round on 3 September to 🇯🇵Takumi Nomura and Yuichi Shimogami, 14-21, 21-16, 21-19. 🆕Added on 19 September 2026: this match was on our China Masters 2026 page all along, written in romaji as KIM Won Ho / SEO Seung Jae, but this page had not counted it since it went live on 10 September 2026. Our tournament page, the official BWF day data (1 September 2026, men's doubles, round of 32) and the draw on English Wikipedia (top seeds) all agree.

Asian Games 2026

Asian Games・Ichinomiya, Aichi, Japan

They played as first seeds and took bronze (there is no bronze-medal match at the Asian Games, so both beaten semi-finalists get bronze). After a first-round bye, they opened on Saturday 26 September by beating Aaron CHIA / TEE Kai Wun (MAS) 21-19, 21-16. In the quarter-final on Sunday 27 September they came from a game down against 🇯🇵Kakeru Kumagai / Hiroki Nishi to win 15-21, 21-17, 21-15 (their second meeting of the year, after the Japan Open in July). 🔴In the semi-final on Monday 28 September they lost 11-21, 14-21 to Leo Rolly CARNANDO / Daniel MARTHIN (INA), who went on from unseeded to gold — their second defeat to the same pair in four weeks, after the China Masters 2026 first round on 1 September (19-21, 19-21). At Hangzhou 2022 the two of them won medals with different partners (Kim Won-ho men's doubles silver with Choi Sol-gyu, Seo Seung-jae mixed doubles bronze with Chae Yu-jung). ⚠️Our Asian Games 2026 page holds the medal result and the quarter-final score; all three scores here were also checked against the official results site and the English Wikipedia draw, which agree. They are not yet added to this page's count (eight matches, four wins, four defeats).

Denmark Open 2026

Super 750・Odense, Denmark

They are the top seeds and, in the quarter-final on Friday 16 October they beat 🇯🇵Kakeru Kumagai / Hiroki Nishi 21-5, 21-17 to reach the semi-finals (last four) on Saturday 17 October (the tournament runs to 18 October). It is the third meeting we record this year, after the Japan Open second round in July and the Asian Games quarter-final in September, and they have won all three. ⚠️We have not recorded the scores of their first- and second-round matches (none of their Denmark Open matches, the quarter-final included, are in the count above).

French Open 2026

Super 750・near Paris, France

Our French Open 2026 page lists them as the defending men's doubles champions, from the 2025 edition. 🎯The 2026 draw came out on 15 October: they are the top seeds and meet 🇯🇵Hiroki Okamura / Kyohei Yamashita in the first round (withdrawals after the draw are still possible).

The eight matches we had recorded for them in 2026 as of 10 September are four wins and four defeats. Their later Asian Games 2026 matches are not in the eight. The official BWF day data has fifteen across the same four events, and there they win eleven and lose four. We hold eight of the fifteen, and all four defeats sit among them. 🆕Added on 19 September 2026: when this page went live on 10 September 2026 it counted only the Japan Open, the China Open and the World Championships, and missed the China Masters first-round defeat on 1 September, which our tournament page carried in romaji.

• 🔴Three pairs beat them — ALFIAN / FIKRI (INA) in two finals, Aaron CHIA / SOH Wooi Yik (MAS) in the World Championships semi-final, and Leo Rolly CARNANDO / Daniel MARTHIN (INA) in the China Masters first round. That first round is their only defeat outside a final or a semi-final.
• 📏Every one of the eight games lost in those four defeats was lost by four points or fewer, and five of them were 19-21. Even the three defeats in two games contain no heavy one.
• 🔁They beat Chia and Soh in two finals in the same year — 21-15, 12-21, 21-18 at the Malaysia Open and 18-21, 21-12, 21-19 at the All England, per the career table on English Wikipedia. ⚠️We have no tournament page for either. They lost the semi-final that mattered most to a pair they had beaten in two finals.
• 🎯Seven of the eight opponents we hold rank 2nd, 4th, 6th and 8th in the world on 8 September 2026, plus Japan's 21st and 26th. ⚠️We give no ranking for the China Masters opponents, because we could not confirm one in two sources. Two of their four wins here came against Japanese pairs, so the same matches can be read from the other side on the pages for Kumagai and Nishi and Yuichi Shimogami.
• ⏱All four of their World Championships matches ended in two games — 38, 38, 41 and 43 minutes. The longest, at 43, was the one they lost. ⚠️Not one of them went to a third game.
• 🇬🇧They met Ben LANE / Sean VENDY (ENG, world No. 8 on 8 September 2026) twice in 2026 and won both — the China Open semi-final on 25 July (21-19, 21-13) and the World Championships third round on 20 August (21-13, 21-16). ⚠️The second of those does not appear on our tournament page at all.

The scores are primary records on our own tournament pages, and every one of them was checked point by point against the official BWF day data — same day, same opponent, same score. ⚠️The China Open semi-final is the exception: our page stops at 2-0 in games, so the points there come from the BWF data. ⚠️The China Masters first round was on our tournament page all along, written in romaji, and this page missed it when it went live.

• 2026 — All England Open (Super 1000) — men's doubles champions, back to back
  They beat Aaron CHIA / SOH Wooi Yik (MAS) 18-21, 21-12, 21-19 in the final. Our All England 2027 page also calls it a second title in a row, and the career table on English Wikipedia agrees. ⚠️We have no tournament page for that edition, so we hold no match-by-match record of it.
• 2026 — Malaysia Open (Super 1000) — men's doubles champions
  The career table on English Wikipedia gives the final as 21-15, 12-21, 21-18 against Aaron CHIA / SOH Wooi Yik (MAS). ⚠️We have no tournament page for that event.
• 2026 — Badminton Asia Championships (Ningbo) — men's doubles champions
  The same career table gives the final as 21-13, 21-17 against their compatriots KANG Min-hyuk / KI Dong-ju. ⚠️We have no tournament page for that event.
• 2026 — BWF World Championships — men's doubles bronze
  They lost the semi-final on 22 August to Aaron CHIA / SOH Wooi Yik (MAS, 4th seeds) 17-21, 18-21. Our tournament page records the defending champions going out; the career table on English Wikipedia records the same match as a bronze medal.
• 2026 — Runners-up at the Daihatsu Japan Open (Super 750) and the China Open (Super 1000)
  Both finals were against ALFIAN / FIKRI (INA): 19-21, 17-21 on 19 July and 21-16, 19-21, 19-21 on 26 July.
• 2025 — BWF World Championships (Paris) — champions, their first world title as a pair
  The final was 21-17, 21-12 against CHEN Bo Yang / LIU Yi (CHN). Our World Championships 2026 page calls them the defending champions and records that it was a first title; the medal list on English Wikipedia agrees.
• 2025 — BWF World Tour Finals — champions
  The career table on English Wikipedia gives the final as 21-18, 21-14 against LIANG Wei Keng / WANG Chang (CHN). ⚠️We have no tournament page for that event.
• 2025 — World No. 1 as a pair (22 July 2025)
  The BWF World Ranking entry on English Wikipedia gives No. 1 on 22 July 2025 as the pair's highest position. Rankings move every week, so we always publish the date with the number.
• 2026 — Asian Games (Aichi-Nagoya) men's doubles bronze
  First seeds; beaten 11-21, 14-21 in the semi-final by the eventual champions Carnando / Marthin (INA). The medal table on our Asian Games 2026 page and the official results site agree. Their first Asian Games medal as a pair.
• 2022 — Asian Games (Hangzhou) — a medal each, with different partners
  Kim Won-ho took men's doubles silver with Choi Sol-gyu, and Seo Seung-jae took mixed doubles bronze with Chae Yu-jung. The medal table on our Asian Games 2026 page and the medal lists on English Wikipedia agree. They were not yet playing together.

They are now playing the Denmark Open 2026 (13–18 October, Odense, Denmark, Super 750) as the top seeds. They beat 🇯🇵Kakeru Kumagai / Hiroki Nishi 21-5, 21-17 in the quarter-final on Friday 16 October and are into the semi-finals on Saturday 17 October. We have not recorded the scores of their first- and second-round matches.

Before that, the most recent match we hold a score for was the Asian Games 2026 semi-final on Monday 28 September (lost 11-21, 14-21 to Carnando / Marthin; bronze). They are not on our Arctic Open 2026 page (from 6 October).

We list them as defending champions at two coming events: the French Open 2026 from 20 to 25 October and the All England Open 2027 from 4 to 14 March.

⚠️ The French Open 2026 draw came out on 15 October: they are the top seeds and meet 🇯🇵Hiroki Okamura / Kyohei Yamashita in the first round (withdrawals after the draw are still possible). The All England Open 2027 entry list has not been published. We do not print guessed entries. We update this page and the tournament pages as entries are confirmed.

"Two wins and one defeat against the same pair" sounds like nothing much. That is exactly their 2026 against Aaron Chia and Soh Wooi Yik — except that the two wins were finals and the defeat was a World Championships semi-final. Keep the date, the round and the score of each meeting, and the same two wins and one defeat read completely differently afterwards. The two lost finals work the same way: 19-21, 17-21 and 21-16, 19-21, 19-21 are a night with no game won, and a night where a lead went in two-point pieces.

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