| Heat F 18:05 |   | time | gap | L | Ag | pts | Rk | 100m | 150m | Ol |  | 1. Woomin Kim |   South Korea | 3:42.71 |   | 3 | 22 | 964 | 1. | 1:49.17 | 2:46.04 | QT |  | 2. Elijah Winnington |   Australia | 3:42.86 | +0.15s | 4 | 23 | 962 | 1. | 1:50.94 | 2:48.03 | QT |  | 3. Lukas Martens |   Germany | 3:42.96 | +0.25s | 5 | 22 | 961 | 1. | 1:50.61 | 2:47.53 | QT |  | 4. Guilherme Costa |   Brazil | 3:44.22 | +1.51s | 7 | 25 | 945 | 1. | 1:51.59 | 2:49.08 | QT |  | 5. Lucas Pierre A Henveaux |   Belgium | 3:44.61 | +1.90s | 1 | 23 | 940 | 1. | 1:50.61 | 2:48.22 | QT |  | 6. Victor Johansson |   Sweden | 3:45.87 | +3.16s | 8 | 25 | 924 | 1. | 1:51.75 | 2:49.16 | QT |  | 7. Daniel Wiffen |   Ireland | 3:46.65 | +3.94s | 6 | 22 | 915 | 1. | 1:51.25 | 2:48.76 | QT |  | 8. Felix Auboeck |   Austria | 3:51.60 | +8.89s | 2 | 27 | 857 | 1. | 1:52.25 | 2:52.08 |   |   
| World and Championship Record: Paul Bieddermanna, Germany |  | Olympic Qualification Time (OQT Tokyo 2020): 3:46.78 |  | Olympic Consideration Time (+0.5% OQT): 3:47.91 |   
|
 Heats - Sunday, 11th February 08:44 |  | Best 8 times advanced to Final. OQT - First 11. OCT - First 16. |   
| Heat 6 09:12 |   | time | gap | L | Ag | pts | Rk | 50m | 100m | 150m | Ol |  | 1. Elijah Winnington |   Australia | 3:44.37 |   | 5 | 23 | 943 | 1. | 53.50s | 1:50.72 | 2:47.69 | QT |  | 2. Woomin Kim |   South Korea | 3:45.14 | +0.77s | 3 | 22 | 933 | 3. | 53.22s | 1:50.44 | 2:48.01 | QT |  | 3. Daniel Wiffen |   Ireland | 3:45.52 | +1.15s | 2 | 22 | 929 | 4. | 54.16s | 1:50.92 | 2:48.49 | QT |  | 4. David Johnston |   United States | 3:46.99 | +2.62s | 1 | 22 | 911 | 12. | 54.70s | 1:51.97 | 2:49.60 | CT |  | 5. Liwei Fei |   China | 3:47.06 | +2.69s | 8 | 20 | 910 | 13. | 53.86s | 1:51.43 | 2:49.25 | CT |  | 6. Matteo Ciampi |   Italy | 3:47.23 | +2.86s | 0 | 27 | 908 | 14. | 54.36s | 1:52.08 | 2:50.16 | CT |  | 7. Antonio Djakovic |   Switzerland | 3:47.81 | +3.44s | 6 | 21 | 901 | 15. | 53.84s | 1:51.40 | 2:50.03 | CT |  | 8. Ahmed Hafnaoui |   Tunisia | 3:48.05 | +3.68s | 4 | 21 | 898 | 17. | 53.96s | 1:51.39 | 2:49.74 |   |  | 9. Danas Rapsys |   Lithuania | 3:48.72 | +4.35s | 7 | 28 | 890 | 20. | 53.65s | 1:51.28 | 2:50.23 |   |  | 10.Logan Fontaine |   France | 3:55.60 | +11.23s | 9 | 24 | 814 | 35. | 56.18s | 1:54.28 | 2:54.26 |   |   
| Heat 5 09:06 |   | time | gap | L | Ag | pts | Rk | 50m | 100m | 150m | Ol |  | 1. Lukas Martens |   Germany | 3:44.77 | +0.40s | 4 | 22 | 938 | 2. | 53.92s | 1:51.54 | 2:48.15 | QT |  | 2. Felix Auboeck |   Austria | 3:45.53 | +1.16s | 3 | 27 | 929 | 5. | 55.20s | 1:52.77 | 2:50.41 | QT |  | 3. Guilherme Costa |   Brazil | 3:46.03 | +1.66s | 5 | 25 | 922 | 6. | 54.03s | 1:52.06 | 2:49.39 | QT |  | 4. Lucas Pierre A Henveaux |   Belgium | 3:46.15 | +1.78s | 0 | 23 | 921 | 7. | 54.78s | 1:52.21 | 2:49.51 | QT |  | 5. Zhanshuo Zhang |   China | 3:46.46 | +2.09s | 7 | 16 | 917 | 10. | 54.35s | 1:52.42 | 2:50.66 | QT |  | 6. Kristof Rasovszky |   Hungary | 3:46.77 | +2.40s | 8 | 26 | 913 | 11. | 55.08s | 1:52.84 | 2:50.24 | QT |  | 7. Sven Schwarz |   Germany | 3:47.82 | +3.45s | 1 | 22 | 901 | 16. | 54.80s | 1:52.66 | 2:51.10 | CT |  | 8. Alfonso Enrique Mestre Vivas |   Venezuela | 3:48.38 | +4.01s | 9 | 22 | 894 | 18. | 54.90s | 1:52.36 | 2:51.04 |   |  | 9. Petar Petrov Mitsin |   Bulgaria | 3:49.43 | +5.06s | 6 | 18 | 882 | 23. | 53.82s | 1:51.66 | 2:49.87 |   |  | 10.Marco De Tullio |   Italy | 3:49.44 | +5.07s | 2 | 23 | 882 | 24. | 54.50s | 1:52.61 | 2:50.77 |   |   
| Heat 4 09:01 |   | time | gap | L | Ag | pts | Rk | 50m | 100m | 150m | Ol |  | 1. Victor Johansson |   Sweden | 3:46.20 | +1.83s | 6 | 25 | 920 | 8. | 54.82s | 1:52.04 | 2:49.49 | QT |  | 2. David Aubry |   France | 3:46.40 | +2.03s | 5 | 27 | 918 | 9. | 54.80s | 1:52.62 | 2:49.65 | QT |  | 3. Hoe Yean Khiew |   Malaya | 3:49.14 | +4.77s | 9 | 21 | 885 | 21. | 55.37s | 1:53.35 | 2:51.48 |   |  | 4. Kregor Zirk |   Estonia | 3:49.34 | +4.97s | 2 | 24 | 883 | 22. | 55.32s | 1:53.48 | 2:52.20 |   |  | 5. Ahmed Jaouadi |   Tunisia | 3:49.85 | +5.48s | 3 | 18 | 877 | 25. | 55.67s | 1:54.14 | 2:52.46 |   |  | 6. Ilia Sibirtsev |   Uzbekistan | 3:50.09 | +5.72s | 1 | 22 | 874 | 26. | 54.70s | 1:52.27 | 2:50.74 |   |  | 7. Jon Joentvedt |   Norway | 3:50.71 | +6.34s | 7 | 20 | 867 | 27. | 54.50s | 1:52.59 | 2:51.86 |   |  | 8. Lorne Wigginton |   Canada | 3:50.91 | +6.54s | 8 | 18 | 865 | 28. | 55.20s | 1:53.50 | 2:52.34 |   |  | 9. Vlad Stefan Stancu |   Romania | 3:52.97 | +8.60s | 4 | 18 | 842 | 31. | 55.56s | 1:54.15 | 2:53.57 |   |  | 10.Huy Hoang Nguyen |   Vietnam | 4:02.13 | +17.76s | 0 | 23 | 750 | 40. | 58.06s | 1:59.46 | 3:00.91 |   |   
| Heat 3 08:56 |   | time | gap | L | Ag | pts | Rk | 50m | 100m | 150m |  | 1. Krzysztof Chmielewski |   Poland | 3:48.71 | +4.34s | 5 | 19 | 890 | 19. | 54.40s | 1:51.95 | 2:50.71 |   |  | 2. Carlos Quijada Roldan |   Spain | 3:52.86 | +8.49s | 4 | 22 | 844 | 29. | 55.56s | 1:54.34 | 2:53.73 |   |  | 3. Glen Jun Wei Lim |   Singapore | 3:52.91 | +8.54s | 2 | 21 | 843 | 30. | 55.91s | 1:54.90 | 2:54.81 |   |  | 4. Dylan Robert Porges Avila |   Mexico | 3:53.11 | +8.74s | 1 | 23 | 841 | 32. | 56.61s | 1:55.91 | 2:55.14 |   |  | 5. Juan Manuel Morales |   Colombia | 3:54.22 | +9.85s | 6 | 23 | 829 | 33. | 55.53s | 1:54.86 | 2:55.15 |   |  | 6. Emir Batur Albayrak |   Turkey | 3:56.34 | +11.97s | 3 | 16 | 807 | 36. | 56.87s | 1:56.45 | 2:57.39 |   |  | 7. Saso Boskan |   Slovenia | 3:56.38 | +12.01s | 7 | 21 | 806 | 37. | 55.45s | 1:55.35 | 2:56.70 |   |  | 8. Rafael Ponce De Leon |   Peru | 3:59.63 | +15.26s | 9 | 23 | 774 | 39. | 56.79s | 1:57.57 | 2:59.09 |   |  | 9. Tonnam Kanteemool |   Thailand | 4:09.41 | +25.04s | 0 | 18 | 686 | 50. | 55.91s | 1:57.47 | 3:03.21 |   |  | 10.Ryan Barbe |   Morocco | 4:16.08 | +31.71s | 8 | 20 | 634 | 53. | 59.37s | 2:03.30 | 3:09.50 |   |   
| Heat 2 08:50 |   | time | gap | L | Ag | pts | Rk | 50m | 100m | 150m |  | 1. Samuel Kostal |   Slovakia | 3:54.78 | +10.41s | 5 | 17 | 823 | 34. | 57.26s | 1:56.36 | 2:55.15 |   |  | 2. Loris Bianchi |   San Marino | 3:58.47 | +14.10s | 4 | 22 | 785 | 38. | 57.20s | 1:57.67 | 2:58.15 |   |  | 3. Omar Abbass |   Syria | 4:03.21 | +18.84s | 3 | 24 | 740 | 41. | 58.20s | 1:59.79 | 3:01.74 |   |  | 4. Nikola Gjuretanovikj |   N. Macedonia | 4:04.76 | +20.39s | 2 | 16 | 726 | 43. | 58.40s | 2:00.88 | 3:03.28 |   |  | 5. Nasir Yahya Hussain |   Nepal | 4:05.65 | +21.28s | 0 | 17 | 719 | 44. | 58.42s | 1:59.91 | 3:02.54 |   |  | 6. Ridhwan Abubakar Bwana Mohamed |   Kenya | 4:06.44 | +22.07s | 9 | 23 | 712 | 45. | 59.33s | 2:01.81 | 3:04.50 |   |  | 7. Alberto Vega |   Costa Rica | 4:06.89 | +22.52s | 6 | 18 | 708 | 46. | 58.81s | 2:02.03 | 3:05.72 |   |  | 8. Mal Gashi |   Kosovo | 4:08.51 | +24.14s | 1 | 18 | 694 | 48. | 58.26s | 2:01.35 | 3:04.49 |   |  | 9. Liggjas Joensen |   Faroe | 4:08.59 | +24.22s | 8 | 15 | 693 | 49. | 59.21s | 2:02.12 | 3:06.33 |   |  | -. Gerald Hernandez |   Nicaragua | DNS |   | 7 | 19 | - | -. |   |   |   |   |   
| Heat 1 08:44 |   | time | gap | L | Ag | pts | Rk | 50m | 100m | 150m |  | 1. Matheo Mateos |   Paraguay | 4:04.14 | +19.77s | 1 | 23 | 732 | 42. | 58.42s | 2:01.15 | 3:04.07 |   |  | 2. Xavier Ventura |   El Salvador | 4:07.35 | +22.98s | 4 | 16 | 704 | 47. | 57.80s | 2:01.28 | 3:05.19 |   |  | 3. Khaled Alotaibi |   Kuwait | 4:14.64 | +30.27s | 5 | 17 | 645 | 51. | 59.83s | 2:05.10 | 3:11.24 |   |  | 4. Mahmoud Abu Gharbieh |   Palestine | 4:15.85 | +31.48s | 7 | 17 | 636 | 52. | 1:00.87 | 2:05.86 | 3:10.85 |   |  | 5. Kaeden Gleason |   US Virgin Islands | 4:17.52 | +33.15s | 6 | 16 | 624 | 54. | 59.33s | 2:05.28 | 3:11.92 |   |  | 6. Mohammed Hani S Al Zaki |   Saudi Arabia | 4:21.18 | +36.81s | 3 | 17 | 598 | 55. | 58.19s | 2:02.58 | 3:10.79 |   |  | 7. Mohamed Rihan Shiham |   Maldives | 4:31.96 | +47.59s | 2 | 17 | 529 | 56. | 1:02.14 | 2:10.90 | 3:22.28 |   |   
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