Heat 1 | Team | Time | 1. Mbulaeni Mulaudzi | Rsa | 1:45.72 - Q | 2. Rene Herms | Ger | 1:45.83 - Q | 3. Jae Hoon Lee | Kor | 1:46.24 PB | 4. Arthemon Hatungimana | Bdi | 1:46.35 | 5. Michael Rotich | Ken | 1:46.42 | 6. Nazar Begliyev | Tkm | 1:49.64 PB | 7. Alibay Shukurov | Aze | 1:51.11 | 8. Fadrique Iglesias | Bol | 1:51.87 |
Middle Time | Athlete | Team | Time | 400m | Michael Rotich | Ken | 52.39 |
| Heat 2 | Team | Time | 1. Joseph Mutua | Ken | 1:45.65 - Q | 2. Ricky Soos | Gbr | 1:45.70 - Q PB | 3. Djabir Said Guerni | Alg | 1:45.94 - q | 4. Achraf Tadili | Can | 1:46.63 | 5. David Fiegen | Lux | 1:46.97 | 6. Mindaugas Norbutas | Lit | 1:47.38 SB | 7. Panayiotis Stroubakos | Gre | 1:47.69 | 8. le van Duong | Vie | 1:49.81 NR |
Middle Time | Athlete | Team | Time | 400m | Joseph Mutua | Ken | 52.21 |
| Heat 3 | Team | Time | 1. Wilson Kipketer | Den | 1:44.69 - Q | 2. Jonathan Johnson | USA | 1:45.31 - Q | 3. Jean Patrick Nduwimana | Bdi | 1:45.38 - q | 4. Osmar dos Santos | Bra | 1:45.90 - q | 5. Jason Stewart | Nzl | 1:46.24 PB | 6. Joao Pires | Por | 1:46.71 SB | 7. Jasmin Salihovic | Bsh | 1:49.59 | 8. Jan Sekpona | Tog | 1:54.25 |
Middle Time | Athlete | Team | Time | 400m | Jonathan Johnson | USA | 50.93 |
|