Men 400 m Hurdles
Heat 1
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 3 | Danny Harris | USA | 48.32 | Q |
| 2 | 7 | Erick Keter | KEN | 48.62 | Q |
| 3 | 4 | Fabrizio Mori | ITA | 48.92 | q |
| 4 | 6 | Amadou Dia Ba | SEN | 49.77 | |
| 5 | 1 | Olaf Hense | GER | 50.44 | |
| 6 | 2 | Pedro Rodrigues | POR | 50.50 | |
| 7 | 5 | Marc Dollendorf | BEL | 51.45 |
Heat 2
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 5 | Kriss Akabusi | GBR | 48.79 | Q |
| 2 | 7 | Vladimir Budko | URS | 49.26 | Q |
| 3 | 1 | Eronilde Nunes De Araújo | BRA | 49.60 | q |
| 4 | 2 | Niklas Wallenlind | SWE | 49.77 | q |
| 5 | 6 | Kazuhiko Yamazaki | JPN | 49.97 | |
| 6 | 3 | Michael Grün | GER | 50.30 | |
| 7 | 4 | Ghulam Abbas | PAK | 52.83 |
Heat 3
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 4 | Kevin Young | USA | 49.08 | Q |
| 2 | 3 | Gideon Yego | KEN | 49.59 | Q |
| 3 | 6 | Pedro Chiamulera | BRA | 49.67 | q |
| 4 | 1 | Yoshihiko Saito | JPN | 49.89 | |
| 5 | 5 | Alain Cuypers | BEL | 50.21 | |
| 6 | 7 | Antonio Smith | VEN | 50.59 | |
| 7 | 2 | Carsten Köhrbrück | GER | 50.88 |
Heat 4
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 5 | Winthrop Graham | JAM | 49.13 | Q |
| 2 | 7 | Sven Nylander | SWE | 49.61 | Q |
| 3 | 1 | Krasimir Demirev | BUL | 49.77 | |
| 4 | 6 | Jozef Kucej | TCH | 49.93 | |
| 5 | 2 | Paolo Bellino | ITA | 50.74 | |
| 6 | 4 | Ahmed Abdelhalim Ghanem | EGY | 50.98 | |
| 7 | 3 | Sylvain Moreau | FRA | 51.26 | |
| 8 | 8 | Hamed Ziad Abou | SYR | 51.57 |
Heat 5
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 1 | Samuel Matete | ZAM | 49.13 | Q |
| 2 | 4 | Derrick Adkins | USA | 49.40 | Q |
| 3 | 6 | Shunji Karube | JPN | 49.57 | q |
| 4 | 3 | Domingo Cordero | PUR | 49.60 | q |
| 5 | 7 | Mark Jackson | CAN | 50.13 | |
| 6 | 2 | Leigh Miller | AUS | 51.76 | |
| 5 | Gideon Biwott | KEN | DQ |
Heat 1
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 4 | Danny Harris | USA | 48.21 | Q |
| 2 | 3 | Winthrop Graham | JAM | 48.31 | Q |
| 3 | 6 | Derrick Adkins | USA | 49.37 | Q |
| 4 | 2 | Niklas Wallenlind | SWE | 49.81 | Q |
| 5 | 8 | Eronilde Nunes De Araújo | BRA | 49.91 | |
| 6 | 1 | Shunji Karube | JPN | 49.94 | |
| 7 | 7 | Gideon Yego | KEN | 50.07 | |
| 8 | 5 | Fabrizio Mori | ITA | 50.70 |
Heat 2
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 4 | Kriss Akabusi | GBR | 47.91 | Q |
| 2 | 5 | Samuel Matete | ZAM | 48.30 | Q |
| 3 | 6 | Kevin Young | USA | 48.39 | Q |
| 4 | 3 | Erick Keter | KEN | 48.47 | Q |
| 5 | 8 | Vladimir Budko | URS | 49.53 | |
| 6 | 1 | Sven Nylander | SWE | 49.59 | |
| 7 | 2 | Domingo Cordero | PUR | 49.86 | |
| 8 | 7 | Pedro Chiamulera | BRA | 50.02 |
| Pos | Lane | Athlete | NOC | Mark |
| 1 | 6 | Samuel Matete | ZAM | 47.64 |
| 2 | 5 | Winthrop Graham | JAM | 47.74 |
| 3 | 4 | Kriss Akabusi | GBR | 47.86 |
| 4 | 7 | Kevin Young | USA | 48.01 |
| 5 | 3 | Danny Harris | USA | 48.46 |
| 6 | 1 | Derrick Adkins | USA | 49.28 |
| 7 | 2 | Erick Keter | KEN | 49.99 |
| 8 | 8 | Niklas Wallenlind | SWE | 50.28 |
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 7 | Janeene Vickers | USA | 54.85 | Q |
| 2 | 2 | Tatyana Ledovskaya | URS | 54.94 | Q |
| 3 | 1 | Gowry Retchakan-Hodge | GBR | 54.95 | q |
| 4 | 3 | Frida Johansson | SWE | 55.60 | q |
| 5 | 4 | Ann Maenhout | BEL | 58.39 | |
| 6 | 6 | Marie Womplou | CIV | 58.80 | |
| 7 | 5 | Elma Muros-Posadas | PHI | 59.90 |
Heat 2
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 6 | Anita Protti | SUI | 54.53 | Q |
| 2 | 4 | Margarita Khromova-Ponomaryova | URS | 55.87 | Q |
| 3 | 7 | Gudrun Abt | GER | 56.16 | q |
| 4 | 3 | Lency Montelier | CUB | 57.72 | |
| 5 | 2 | Yanhong Huang | CHN | 58.05 | |
| 6 | 5 | Omotayo Akinremi | NGR | 58.25 |
Heat 3
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 3 | Sally Gunnell | GBR | 54.70 | Q |
| 2 | 5 | Anna Chuprina-Knoroz | URS | 56.15 | Q |
| 3 | 2 | Sabine Busch | GER | 56.37 | q |
| 4 | 6 | Donalda Duprey | CAN | 56.38 | |
| 5 | 7 | Lyn Massey | NZL | 57.55 | |
| 6 | 1 | Junko Hasegawa | JPN | 59.71 | |
| 7 | 4 | Gretha Tromp | NED | 1:00.45 |
Heat 4
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 4 | Irmgard Trojer | ITA | 55.77 | Q |
| 2 | 6 | Kim Batten | USA | 55.77 | Q |
| 3 | 3 | Monica Westén | SWE | 55.79 | q |
| 4 | 5 | Deon Hemmings | JAM | 57.13 | |
| 5 | 7 | Nicoleta Carutasu | ROM | 57.26 | |
| 6 | 2 | Liliana Chala | ECU | 1:01.49 | |
| 7 | 1 | Mirenda Francourt | SEY | 1:05.92 |
Heat 5
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 6 | Sandra Farmer-Patrick | USA | 55.81 | Q |
| 2 | 3 | Heike Meissner | GER | 56.00 | Q |
| 3 | 1 | Nezha Bidouane | MAR | 56.35 | q |
| 4 | 5 | Rosey Edeh | CAN | 57.32 | |
| 5 | 4 | Jacqui Parker | GBR | 57.81 | |
| 6 | 2 | Reawadee Srithoa | THA | 58.74 | |
| 7 | 7 | Mari Bjone | NOR | 59.00 |
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 3 | Anita Protti | SUI | 54.26 | Q |
| 2 | 2 | Sandra Farmer-Patrick | USA | 54.44 | Q |
| 3 | 4 | Janeene Vickers | USA | 54.63 | Q |
| 4 | 1 | Heike Meissner | GER | 54.77 | Q |
| 5 | 5 | Gowry Retchakan-Hodge | GBR | 54.88 | |
| 6 | 6 | Frida Johansson | SWE | 55.36 | |
| 7 | 8 | Anna Chuprina-Knoroz | URS | 55.81 | |
| 8 | 7 | Nezha Bidouane | MAR | 56.62 |
Heat 2
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 4 | Sally Gunnell | GBR | 54.24 | Q |
| 2 | 6 | Tatyana Ledovskaya | URS | 54.36 | Q |
| 3 | 3 | Kim Batten | USA | 54.70 | Q |
| 4 | 7 | Margarita Khromova-Ponomaryova | URS | 55.22 | Q |
| 5 | 2 | Monica Westén | SWE | 55.51 | |
| 6 | 5 | Irmgard Trojer | ITA | 55.66 | |
| 7 | 8 | Sabine Busch | GER | 55.93 | |
| 8 | 1 | Gudrun Abt | GER | 56.17 |
| Pos | Lane | Athlete | NOC | Mark |
| 1 | 6 | Tatyana Ledovskaya | URS | 53.11 |
| 2 | 5 | Sally Gunnell | GBR | 53.16 |
| 3 | 7 | Janeene Vickers | USA | 53.47 |
| 4 | 4 | Sandra Farmer-Patrick | USA | 53.95 |
| 5 | 8 | Kim Batten | USA | 53.98 |
| 6 | 3 | Anita Protti | SUI | 54.25 |
| 7 | 1 | Heike Meissner | GER | 55.26 |
| 8 | 2 | Margarita Khromova-Ponomaryova | URS | 55.27 |
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