| Final 18:02 |   | time | gap | L | Y | pts | 100m | 200m | 300m |  | 1. Elijah Winnington |   Australia | 3:41.22 |   | 5 | 22 | 984 | 52.96s | 1:49.97 | 2:46.89 |  | 2. Lukas Martens |   Germany | 3:42.85 | +1.63s | 6 | 20 | 963 | 53.73s | 1:50.14 | 2:46.31 |  | 3. Guilherme Costa |   Brazil | 3:43.31 | +2.09s | 3 | 23 | 957 | 54.24s | 1:51.71 | 2:48.94 |  | 4. Felix Auboeck |   Austria | 3:43.58 | +2.36s | 4 | 25 | 953 | 54.78s | 1:51.38 | 2:48.37 |  | 5. Marco De Tullio |   Italy | 3:44.14 | +2.92s | 8 | 21 | 946 | 53.85s | 1:50.86 | 2:47.51 |  | 6. Woomin Kim |   South Korea | 3:45.64 | +4.42s | 7 | 20 | 927 | 54.00s | 1:51.26 | 2:48.69 |  | 7. Kieran Smith |   United States | 3:46.43 | +5.21s | 2 | 22 | 918 | 54.05s | 1:51.61 | 2:49.62 |  | 8. Trey Freeman |   United States | 3:46.53 | +5.31s | 1 | 22 | 916 | 54.64s | 1:52.87 | 2:51.13 |   
| World and Championship Record: Paul Biedermann, Germany 3:40.07 Rome, Italy 26th July 2009 |   
|
 Heats - Saturday, 18th June 09:16 |  | Best 8 times advanced to Final.  |   
| Heat 5 09:38 |   | time | gap | L | Y | pts | Rk | 100m | 200m | 300m  |  | 1. Lukas Martens |   Germany | 3:45.04 | +1.21s | 4 | 20 | 935 | 4. | 54.52s | 1:52.41 | 2:49.19 |  | 2. Marco De Tullio |   Italy | 3:46.47 | +2.64s | 6 | 21 | 917 | 8. | 54.60s | 1:52.57 | 2:49.85 |  | 3. Mack Horton |   Australia | 3:46.57 | +2.74s | 3 | 26 | 916 | 9. | 54.85s | 1:52.70 | 2:50.58 |  | 4. Antonio Djakovic |   Switzerland | 3:46.90 | +3.07s | 2 | 19 | 912 | 10. | 54.85s | 1:53.25 | 2:50.69 |  | 5. Henning Bennet Muhlleitner |   Germany | 3:47.17 | +3.34s | 5 | 24 | 909 | 11. | 54.95s | 1:53.00 | 2:50.44 |  | 6. Lorenzo Galossi |   Italy | 3:47.19 | +3.36s | 7 | 16 | 908 | 12. | 54.47s | 1:51.88 | 2:49.86 |  | 7. Marwan Elkamash |   Egypt | 3:47.21 | +3.38s | 8 | 28 | 908 | 13. | 54.94s | 1:52.51 | 2:50.19 |  | 8. Henrik Christiansen |   Norway | 3:50.18 | +6.35s | 1 | 25 | 873 | 19. | 56.38s | 1:54.93 | 2:53.28 |  | 9. Kregor Zirk |   Estonia | 3:50.62 | +6.79s | 0 | 22 | 868 | 20. | 56.43s | 1:54.95 | 2:53.54 |  | 10.Ziyang Zhang |   China | 3:53.55 | +9.72s | 9 | 21 | 836 | 25. | 55.53s | 1:53.73 | 2:53.23 |   
| Heat 4 09:32 |   | time | gap | L | Y | pts | Rk | 100m | 200m | 300m  |  | 1. Felix Auboeck |   Austria | 3:43.83 |   | 5 | 25 | 950 | 1. | 54.99s | 1:51.73 | 2:48.62 |  | 2. Elijah Winnington |   Australia | 3:44.42 | +0.59s | 4 | 22 | 942 | 2. | 53.20s | 1:50.32 | 2:48.08 |  | 3. Guilherme Costa |   Brazil | 3:44.52 | +0.69s | 2 | 23 | 941 | 3. | 54.15s | 1:50.83 | 2:48.02 |  | 1. Woomin Kim |   South Korea | 3:45.87 | +2.04s | 4 | 20 | 924 | 6. | 54.16s | 1:52.05 | 2:49.47 |  | 5. Trey Freeman |   United States | 3:46.12 | +2.29s | 1 | 22 | 921 | 7. | 54.30s | 1:51.50 | 2:49.04 |  | 6. Daniel Jervis |   Great Britain | 3:48.66 | +4.83s | 7 | 26 | 891 | 14. | 55.21s | 1:53.06 | 2:51.37 |  | 7. Danas Rapsys |   Lithuania | 3:50.03 | +6.20s | 6 | 27 | 875 | 18. | 55.53s | 1:53.60 | 2:52.11 |  | 8. Xinjie Ji |   China | 3:51.84 | +8.01s | 8 | 24 | 855 | 23. | 56.04s | 1:54.72 | 2:54.31 |  | 9. Mykhailo Romanchuk |   Ukraine | 3:52.92 | +9.09s | 9 | 25 | 843 | 24. | 56.24s | 1:55.19 | 2:54.49 |  | 10.Huy Hoang Nguyen |   Vietnam | 3:54.05 | +10.22s | 0 | 21 | 831 | 26. | 55.28s | 1:53.96 | 2:53.89 |   
| Heat 3 09:27 |   | time | gap | L | Y | pts | Rk | 100m | 200m | 300m  |  | 4. Kieran Smith |   United States | 3:45.70 | +1.87s | 3 | 22 | 927 | 5. | 53.60s | 1:50.73 | 2:48.63 |  | 2. Hoe Yean Khiew |   Malaysia | 3:48.72 | +4.89s | 2 | 19 | 890 | 15. | 55.20s | 1:53.27 | 2:51.21 |  | 3. Bar Soloveychik |   Israel | 3:49.87 | +6.04s | 9 | 21 | 877 | 16. | 55.25s | 1:53.71 | 2:52.40 |  | 4. Dimitrios Markos |   Greece | 3:49.93 | +6.10s | 5 | 20 | 876 | 17. | 54.92s | 1:53.08 | 2:51.23 |  | 5. Jeremy Bagshaw |   Canada | 3:50.77 | +6.94s | 6 | 30 | 867 | 21. | 55.13s | 1:53.41 | 2:52.06 |  | 6. Juan Manuel Morales |   Colombia | 3:51.50 | +7.67s | 8 | 21 | 859 | 22. | 55.20s | 1:54.16 | 2:53.87 |  | 7. Yordan Yanchev |   Bulgaria | 3:56.52 | +12.69s | 0 | 20 | 805 | 29. | 56.16s | 1:55.18 | 2:55.98 |  | 8. Jose Lopes |   Portugal | 3:56.59 | +12.76s | 1 | 21 | 804 | 30. | 56.00s | 1:55.35 | 2:56.17 |  | 9. Ming Ho Cheuk |   Hong Kong | 3:58.38 | +14.55s | 7 | 20 | 786 | 32. | 55.88s | 1:55.83 | 2:57.51 |  | -. Matthew Sates |   South Africa | DNS |   | 3 | 18 | - | -. |   |   |   |   
| Heat 2 09:21 |   | time | gap | L | Y | pts | Rk | 100m | 200m | 300m  |  | 1. Glen Jun Wei Lim |   Singapore | 3:54.63 | +10.80s | 5 | 20 | 825 | 27. | 56.21s | 1:55.98 | 2:56.07 |  | 2. Pavel Alovatki |   Moldova | 3:55.64 | +11.81s | 1 | 18 | 814 | 28. | 58.20s | 1:58.45 | 2:56.97 |  | 3. Tonnam Kanteemool |   Thailand | 3:56.96 | +13.13s | 2 | 17 | 801 | 31. | 57.39s | 1:58.29 | 2:59.01 |  | 4. Kushagra Rawat |   India | 3:59.69 | +15.86s | 3 | 22 | 773 | 33. | 57.02s | 1:57.90 | 2:59.15 |  | 5. Wesley Tikiariki Roberts |   Cook Islands | 4:00.67 | +16.84s | 4 | 24 | 764 | 34. | 56.71s | 1:57.94 | 3:00.10 |  | 6. Irakli Revishvili |   Georgia | 4:02.01 | +18.18s | 6 | 32 | 751 | 35. | 57.91s | 1:59.70 | 3:01.16 |  | 7. Adib Khalil |   Lebanon | 4:02.64 | +18.81s | 7 | 19 | 746 | 36. | 58.09s | 2:00.00 | 3:02.15 |  | 8. Noah Mascoll-Gomes |   Antigua Barbuda | 4:02.93 | +19.10s | 8 | 23 | 743 | 37. | 58.29s | 1:59.86 | 3:01.49 |  | 9. Loris Bianchi |   San Marino | 4:04.57 | +20.74s | 0 | 20 | 728 | 38. | 58.22s | 1:59.95 | 3:02.89 |  | 10.Ramazan Omarov |   Kirgystan | 4:16.22 | +32.39s | 9 | 16 | 633 | 39. | 58.58s | 2:00.44 | 3:07.26 |   
| Heat 1 09:16 |   | time | gap | L | Y | pts | Rk | 100m | 200m | 300m  |  | 1. Muhammad Amaan Siddiqui |   Pakistan | 4:18.03 | +34.20s | 3 | 15 | 620 | 40. | 1:01.30 | 2:06.44 | 3:12.51 |  | 2. Haziq Samil |   Brunei | 4:23.59 | +39.76s | 4 | 21 | 581 | 41. | 1:03.27 | 2:10.17 | 3:17.38 |  | 3. Charles Rachana Bennici |   Cambodja | 4:26.82 | +42.99s | 5 | 20 | 561 | 42. | 1:01.76 | 2:08.63 | 3:17.36 |   
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