| Heat 1 | Piscina Comunale Beethoven - 10 October 2021 - Start Time: 10:39 |
| Pos. | Lane | Bib | Athlete | Year | Cat. | | Mark | Points |
| 1 | 5 | 22 | LEPINE Amaury | 1998 | MSM | FRA FRANCE | 43.26 q | |
| 2 | 4 | 66 | VIEIRA José | 1983 | MMB | POR PORTUGAL | 44.37 q | |
| 3 | 3 | 27 | HOLMES Mark | 1983 | MMB | GBR GREAT BRITAIN & N. IRELAND | 49.04 | |
| 4 | 6 | 54 | MUSZYNSKI Jakub | 2003 | MSM | POL POLAND | 51.44 | |
| 5 | 2 | 28 | LACEY Zachary | 2000 | MSM | GBR GREAT BRITAIN & N. IRELAND | 52.28 | |
| 6 | 7 | 85 | MENC Alperen | 2002 | MSM | TUR TURKEY | 54.35 | |
| 7 | 1 | 68 | PALIMARIU A.Constantin | 2001 | MSM | ROU ROMANIA | 1:10.83 | |
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| Heat 2 | Piscina Comunale Beethoven - 10 October 2021 - Start Time: 10:42 |
| Pos. | Lane | Bib | Athlete | Year | Cat. | | Mark | Points |
| 1 | 4 | 65 | VAZ Joao | 1992 | MMA | POR PORTUGAL | 41.85 q | |
| 2 | 5 | 58 | MATOS Diogo | 1999 | MSM | POR PORTUGAL | 42.81 q | |
| 3 | 2 | 38 | MANAUZZI Paolo Alfredo | 1990 | MMA | ITA ITALY | 43.17 q | |
| 4 | 3 | 49 | KRUPINSKI Pawel | 1987 | MMA | POL POLAND | 46.69 q | |
| 5 | 6 | 62 | REGO Diogo | 1997 | MSM | POR PORTUGAL | 47.21 | |
| 6 | 7 | 78 | GOLTNIK Urban | 1996 | MMA | SLO SLOVENIA | 54.90 | |
| 7 | 8 | 70 | ZELENAK DAVID | 2005 | MJM | ROU ROMANIA | 1:10.50 | |
| | 1 | 4 | KOSEC Nikola | 2002 | MSM | CRO CROATIA | DQ | |
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| Heat 3 | Piscina Comunale Beethoven - 10 October 2021 - Start Time: 10:46 |
| Pos. | Lane | Bib | Athlete | Year | Cat. | | Mark | Points |
| 1 | 5 | 20 | DUTAY Raphael | 1991 | MMA | FRA FRANCE | 43.81 q | |
| 2 | 6 | 12 | PAIS Hardi | 1996 | MSM | EST ESTONIA | 46.44 q | |
| 3 | 2 | 10 | LOIK Kaspar Paul | 2001 | MSM | EST ESTONIA | 48.53 | |
| 4 | 7 | 52 | MATUSIEWICZ Bartosz | 1998 | MSM | POL POLAND | 52.89 | |
| 5 | 1 | 86 | OKTEM Ozgun | 1997 | MSM | TUR TURKEY | 1:00.94 | |
| | 8 | 2 | KOSTADINOV Emiliyan | 2002 | MSM | BUL BULGARIA | DQ | |
| | 4 | 46 | ZAFFARONI Paolo | 1996 | MMA | ITA ITALY | DNS | |
| | 3 | 75 | RYABENKOV Alexander | 2000 | MSM | RUS RUSSIA | DNS | |
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| SUMMARY | Piscina Comunale Beethoven |
| Pos. | Lane | Bib | Athlete | Year | Cat. | | Mark | Points |
| 1 | 4 | 65 | VAZ Joao | 1992 | MMA | POR PORTUGAL | 41.85 q | |
| 2 | 5 | 58 | MATOS Diogo | 1999 | MSM | POR PORTUGAL | 42.81 q | |
| 3 | 2 | 38 | MANAUZZI Paolo Alfredo | 1990 | MMA | ITA ITALY | 43.17 q | |
| 4 | 5 | 22 | LEPINE Amaury | 1998 | MSM | FRA FRANCE | 43.26 q | |
| 5 | 5 | 20 | DUTAY Raphael | 1991 | MMA | FRA FRANCE | 43.81 q | |
| 6 | 4 | 66 | VIEIRA José | 1983 | MMB | POR PORTUGAL | 44.37 q | |
| 7 | 6 | 12 | PAIS Hardi | 1996 | MSM | EST ESTONIA | 46.44 q | |
| 8 | 3 | 49 | KRUPINSKI Pawel | 1987 | MMA | POL POLAND | 46.69 q | |
| 9 | 6 | 62 | REGO Diogo | 1997 | MSM | POR PORTUGAL | 47.21 | |
| 10 | 2 | 10 | LOIK Kaspar Paul | 2001 | MSM | EST ESTONIA | 48.53 | |
| 11 | 3 | 27 | HOLMES Mark | 1983 | MMB | GBR GREAT BRITAIN & N. IRELAND | 49.04 | |
| 12 | 6 | 54 | MUSZYNSKI Jakub | 2003 | MSM | POL POLAND | 51.44 | |
| 13 | 2 | 28 | LACEY Zachary | 2000 | MSM | GBR GREAT BRITAIN & N. IRELAND | 52.28 | |
| 14 | 7 | 52 | MATUSIEWICZ Bartosz | 1998 | MSM | POL POLAND | 52.89 | |
| 15 | 7 | 85 | MENC Alperen | 2002 | MSM | TUR TURKEY | 54.35 | |
| 16 | 7 | 78 | GOLTNIK Urban | 1996 | MMA | SLO SLOVENIA | 54.90 | |
| 17 | 1 | 86 | OKTEM Ozgun | 1997 | MSM | TUR TURKEY | 1:00.94 | |
| 18 | 8 | 70 | ZELENAK DAVID | 2005 | MJM | ROU ROMANIA | 1:10.50 | |
| 19 | 1 | 68 | PALIMARIU A.Constantin | 2001 | MSM | ROU ROMANIA | 1:10.83 | |
| | 8 | 2 | KOSTADINOV Emiliyan | 2002 | MSM | BUL BULGARIA | DQ | |
| | 1 | 4 | KOSEC Nikola | 2002 | MSM | CRO CROATIA | DQ | |
| | 3 | 75 | RYABENKOV Alexander | 2000 | MSM | RUS RUSSIA | DNS | |
| | 4 | 46 | ZAFFARONI Paolo | 1996 | MMA | ITA ITALY | DNS | |
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| Final | Piscina Comunale Beethoven - 10 October 2021 - Start Time: 15:09 |
| Pos. | Lane | Bib | Athlete | Year | Cat. | | Mark | Points |
| 1 | 4 | 65 | VAZ Joao | 1992 | MMA | POR PORTUGAL | 42.61 | 9 |
| 2 | 5 | 58 | MATOS Diogo | 1999 | MSM | POR PORTUGAL | 43.03 | 7 |
| 3 | 6 | 22 | LEPINE Amaury | 1998 | MSM | FRA FRANCE | 43.35 | 6 |
| 4 | 3 | 38 | MANAUZZI Paolo Alfredo | 1990 | MMA | ITA ITALY | 43.36 | 5 |
| 5 | 2 | 20 | DUTAY Raphael | 1991 | MMA | FRA FRANCE | 43.71 | 4 |
| 6 | 7 | 66 | VIEIRA José | 1983 | MMB | POR PORTUGAL | 44.37 | 3 |
| 7 | 1 | 12 | PAIS Hardi | 1996 | MSM | EST ESTONIA | 47.65 | 2 |
| 8 | 8 | 49 | KRUPINSKI Pawel | 1987 | MMA | POL POLAND | 50.70 | 1 |
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