| Heat 1 | Piscina Comunale Beethoven - 10 October 2021 - Start Time: 10:22 |
| Pos. | Lane | Bib | Athlete | Year | Cat. | | Mark | Points |
| 1 | 5 | 54 | MUSZYNSKI Jakub | 2003 | MSM | POL POLAND | 1:41.81 | |
| 2 | 4 | 50 | KRZEMIEN Grzegorz | 1998 | MSM | POL POLAND | 1:45.01 | |
| 3 | 3 | 77 | CVIJIC Dejan | 1999 | MSM | SLO SLOVENIA | 2:02.24 | |
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| Heat 2 | Piscina Comunale Beethoven - 10 October 2021 - Start Time: 10:25 |
| Pos. | Lane | Bib | Athlete | Year | Cat. | | Mark | Points |
| 1 | 5 | 57 | ALMEIDA André | 2000 | MSM | POR PORTUGAL | 1:13.98 q | |
| 2 | 4 | 36 | DI SILVERIO Marco | 1997 | MSM | ITA ITALY | 1:15.11 q | |
| 3 | 3 | 64 | SANTOS Filipe | 1988 | MMA | POR PORTUGAL | 1:19.24 | |
| 4 | 8 | 48 | GROMADA Szymon | 2003 | MSM | POL POLAND | 1:26.01 | |
| 5 | 6 | 83 | GUNGOR Serhat Emir | 2000 | MSM | TUR TURKEY | 1:26.67 | |
| 6 | 2 | 63 | RIBEIRO José | 1992 | MMA | POR PORTUGAL | 1:28.04 | |
| 7 | 1 | 30 | MACAULEY-CONWAY Conor | 2002 | MSM | GBR GREAT BRITAIN & N. IRELAND | 1:34.06 | |
| 8 | 7 | 86 | OKTEM Ozgun | 1997 | MSM | TUR TURKEY | 1:39.03 | |
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| Heat 3 | Piscina Comunale Beethoven - 10 October 2021 - Start Time: 10:28 |
| Pos. | Lane | Bib | Athlete | Year | Cat. | | Mark | Points |
| 1 | 4 | 38 | MANAUZZI Paolo Alfredo | 1990 | MMA | ITA ITALY | 1:14.58 q | |
| 2 | 5 | 42 | RONCATO Gianmaria | 1995 | MMA | ITA ITALY | 1:15.31 q | |
| 3 | 3 | 16 | TÖTT Eric | 1992 | MMA | EST ESTONIA | 1:17.07 | |
| 4 | 6 | 73 | FAZYLLIN Bilal | 2002 | MSM | RUS RUSSIA | 1:21.40 | |
| 5 | 2 | 61 | PESTANA Rui | 2000 | MSM | POR PORTUGAL | 1:22.05 | |
| 6 | 7 | 79 | SOSTER Alen | 1999 | MSM | SLO SLOVENIA | 1:28.89 | |
| 7 | 8 | 67 | BADEA Bogdan Valentin | 2000 | MSM | ROU ROMANIA | 1:34.19 | |
| 8 | 1 | 84 | KOCAMAZ Berk | 2002 | MSM | TUR TURKEY | 1:44.76 | |
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| Heat 4 | Piscina Comunale Beethoven - 10 October 2021 - Start Time: 10:30 |
| Pos. | Lane | Bib | Athlete | Year | Cat. | | Mark | Points |
| 1 | 4 | 72 | DEGTYAREV Alexey | 2005 | MJM | RUS RUSSIA | 1:10.70 q | |
| 2 | 5 | 60 | PEREIRA Vicente | 2005 | MJM | POR PORTUGAL | 1:13.51 q | |
| 3 | 3 | 23 | MATILLA Cedric | 1995 | MMA | FRA FRANCE | 1:14.53 q | |
| 4 | 6 | 58 | MATOS Diogo | 1999 | MSM | POR PORTUGAL | 1:16.86 q | |
| 5 | 7 | 62 | REGO Diogo | 1997 | MSM | POR PORTUGAL | 1:21.48 | |
| 6 | 2 | 13 | PLOOMIPUU Vahur | 1990 | MMA | EST ESTONIA | 1:24.34 | |
| 7 | 8 | 56 | SLÓSARCZYK Sebastian | 1998 | MSM | POL POLAND | 1:29.14 | |
| 8 | 1 | 80 | TEMNIKAR Luka | 2001 | MSM | SLO SLOVENIA | 1:33.23 | |
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| SUMMARY | Piscina Comunale Beethoven |
| Pos. | Lane | Bib | Athlete | Year | Cat. | | Mark | Points |
| 1 | 4 | 72 | DEGTYAREV Alexey | 2005 | MJM | RUS RUSSIA | 1:10.70 q | |
| 2 | 5 | 60 | PEREIRA Vicente | 2005 | MJM | POR PORTUGAL | 1:13.51 q | |
| 3 | 5 | 57 | ALMEIDA André | 2000 | MSM | POR PORTUGAL | 1:13.98 q | |
| 4 | 3 | 23 | MATILLA Cedric | 1995 | MMA | FRA FRANCE | 1:14.53 q | |
| 5 | 4 | 38 | MANAUZZI Paolo Alfredo | 1990 | MMA | ITA ITALY | 1:14.58 q | |
| 6 | 4 | 36 | DI SILVERIO Marco | 1997 | MSM | ITA ITALY | 1:15.11 q | |
| 7 | 5 | 42 | RONCATO Gianmaria | 1995 | MMA | ITA ITALY | 1:15.31 q | |
| 8 | 6 | 58 | MATOS Diogo | 1999 | MSM | POR PORTUGAL | 1:16.86 q | |
| 9 | 3 | 16 | TÖTT Eric | 1992 | MMA | EST ESTONIA | 1:17.07 | |
| 10 | 3 | 64 | SANTOS Filipe | 1988 | MMA | POR PORTUGAL | 1:19.24 | |
| 11 | 6 | 73 | FAZYLLIN Bilal | 2002 | MSM | RUS RUSSIA | 1:21.40 | |
| 12 | 7 | 62 | REGO Diogo | 1997 | MSM | POR PORTUGAL | 1:21.48 | |
| 13 | 2 | 61 | PESTANA Rui | 2000 | MSM | POR PORTUGAL | 1:22.05 | |
| 14 | 2 | 13 | PLOOMIPUU Vahur | 1990 | MMA | EST ESTONIA | 1:24.34 | |
| 15 | 8 | 48 | GROMADA Szymon | 2003 | MSM | POL POLAND | 1:26.01 | |
| 16 | 6 | 83 | GUNGOR Serhat Emir | 2000 | MSM | TUR TURKEY | 1:26.67 | |
| 17 | 2 | 63 | RIBEIRO José | 1992 | MMA | POR PORTUGAL | 1:28.04 | |
| 18 | 7 | 79 | SOSTER Alen | 1999 | MSM | SLO SLOVENIA | 1:28.89 | |
| 19 | 8 | 56 | SLÓSARCZYK Sebastian | 1998 | MSM | POL POLAND | 1:29.14 | |
| 20 | 1 | 80 | TEMNIKAR Luka | 2001 | MSM | SLO SLOVENIA | 1:33.23 | |
| 21 | 1 | 30 | MACAULEY-CONWAY Conor | 2002 | MSM | GBR GREAT BRITAIN & N. IRELAND | 1:34.06 | |
| 22 | 8 | 67 | BADEA Bogdan Valentin | 2000 | MSM | ROU ROMANIA | 1:34.19 | |
| 23 | 7 | 86 | OKTEM Ozgun | 1997 | MSM | TUR TURKEY | 1:39.03 | |
| 24 | 5 | 54 | MUSZYNSKI Jakub | 2003 | MSM | POL POLAND | 1:41.81 | |
| 25 | 1 | 84 | KOCAMAZ Berk | 2002 | MSM | TUR TURKEY | 1:44.76 | |
| 26 | 4 | 50 | KRZEMIEN Grzegorz | 1998 | MSM | POL POLAND | 1:45.01 | |
| 27 | 3 | 77 | CVIJIC Dejan | 1999 | MSM | SLO SLOVENIA | 2:02.24 | |
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