2026 Busan Open – Singles
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Térence Atmane was the defending champion but chose not to defend his title.
Leandro Riedi won the title after defeating Bu Yunchaokete 3–6, 6–3, 6–2 in the final.
Seeds
- Australia James Duckworth (withdrew)
- Australia Adam Walton (quarterfinals)
- Japan Sho Shimabukuro (quarterfinals)
- Hong Kong Coleman Wong (second round)
- Australia Dane Sweeny (first round)
- Australia Alex Bolt (quarterfinals)
- China Bu Yunchaokete (final)
- Switzerland Leandro Riedi (champion)
Draw
Key
- Q = Qualifier
- WC = Wild card
- LL = Lucky loser
- Alt = Alternate
- ITF = ITF entry
- PR = Protected ranking
- SR = Special ranking
- SE = Special exempt
- JE = Junior exempt
- JR = Junior Accelerator Programme entrant
- CO = College Accelerator Programme entrant
- NG = Next Gen Accelerator Program entrant
- w/o = Walkover
- r = Retired
- d = Defaulted
Finals
| Semifinals | Final | ||||||||||||
| United Kingdom Liam Broady | 63 | 3r | |||||||||||
| 8 | Switzerland Leandro Riedi | 77 | 2 | ||||||||||
| 8 | Switzerland Leandro Riedi | 3 | 6 | 6 | |||||||||
| 7 | China Bu Yunchaokete | 6 | 3 | 2 | |||||||||
| 6 | Australia Alex Bolt | 5 | 2 | ||||||||||
| 7 | China Bu Yunchaokete | 7 | 6 |
Top half
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| Q | Thailand K Samrej | 6 | 4 | 64 | |||||||||||||||||||||||
| Denmark A Holmgren | 3 | 6 | 77 | Denmark A Holmgren | 6 | 6 | |||||||||||||||||||||
| Canada A Galarneau | 6 | 7 | Canada A Galarneau | 1 | 4 | ||||||||||||||||||||||
| Japan K Uchida | 4 | 5 | Denmark A Holmgren | 3 | 6 | 4 | |||||||||||||||||||||
| United Kingdom L Broady | 6 | 6 | United Kingdom L Broady | 6 | 4 | 6 | |||||||||||||||||||||
| United States M Cassone | 0 | 1 | United Kingdom L Broady | 6 | 6 | ||||||||||||||||||||||
| PR | I Ivashka | 77 | 64 | 6 | PR | I Ivashka | 1 | 3 | |||||||||||||||||||
| 5 | Australia D Sweeny | 61 | 77 | 2 | United Kingdom L Broady | 63 | 3r | ||||||||||||||||||||
| 3 | Japan S Shimabukuro | 6 | 6 | 8 | Switzerland L Riedi | 77 | 2 | ||||||||||||||||||||
| I Simakin | 3 | 3 | 3 | Japan S Shimabukuro | 6 | 4 | 77 | ||||||||||||||||||||
| WC | South Korea U-s Park | 6 | 4 | 4 | Kazakhstan B Zhukayev | 3 | 6 | 64 | |||||||||||||||||||
| Kazakhstan B Zhukayev | 4 | 6 | 6 | 3 | Japan S Shimabukuro | 5 | 1 | ||||||||||||||||||||
| China Y Zhou | 1 | 0r | 8 | Switzerland L Riedi | 7 | 6 | |||||||||||||||||||||
| P Kotov | 6 | 2 | P Kotov | 67 | 2r | ||||||||||||||||||||||
| WC | South Korea S-w Kwon | 62 | 4 | 8 | Switzerland L Riedi | 79 | 5 | ||||||||||||||||||||
| 8 | Switzerland L Riedi | 77 | 6 |
Bottom half
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 6 | Australia A Bolt | 7 | 77 | ||||||||||||||||||||||||
| Australia J McCabe | 5 | 62 | 6 | Australia A Bolt | 4 | 6 | 77 | ||||||||||||||||||||
| Q | Chinese Taipei T-l Wu | 6 | 6 | Q | Chinese Taipei T-l Wu | 6 | 4 | 63 | |||||||||||||||||||
| Q | Japan T Daniel | 4 | 4 | 6 | Australia A Bolt | 77 | 77 | ||||||||||||||||||||
| Japan R Noguchi | 6 | 6 | Japan R Noguchi | 64 | 65 | ||||||||||||||||||||||
| France C Chidekh | 2 | 2 | Japan R Noguchi | 6 | 6 | ||||||||||||||||||||||
| Q | Japan Renta Tokuda | 64 | 4 | 4 | Hong Kong C Wong | 2 | 2 | ||||||||||||||||||||
| 4 | Hong Kong C Wong | 77 | 6 | 6 | Australia A Bolt | 5 | 2 | ||||||||||||||||||||
| 7 | China Y Bu | 6 | 6 | 7 | China Y Bu | 7 | 6 | ||||||||||||||||||||
| WC | South Korea Y-s Chung | 1 | 4 | 7 | China Y Bu | 6 | 6 | ||||||||||||||||||||
| Q | M Sharipov | 6 | 5 | 77 | Q | M Sharipov | 4 | 2 | |||||||||||||||||||
| Japan Y Uchiyama | 3 | 7 | 64 | 7 | China Y Bu | 6 | 78 | ||||||||||||||||||||
| LL | Japan J Trotter | 77 | 3 | 6 | 2 | Australia A Walton | 4 | 66 | |||||||||||||||||||
| Q | Australia Ja Delaney | 61 | 6 | 1 | LL | Japan J Trotter | 4 | 77 | 3 | ||||||||||||||||||
| Chinese Taipei Y-h Hsu | 2 | 7 | 2 | 2 | Australia A Walton | 6 | 62 | 6 | |||||||||||||||||||
| 2 | Australia A Walton | 6 | 5 | 6 |