| | Event type
Middleweight (≤75 kilograms), Boys
| Date | 14 – 17 October 2018 | |
|---|---|---|
| Status | YOG | |
| Location | Oceania Pavilion, Parque Olímpico de la Juventud, Villa Soldati, Buenos Aires | |
| Participants | 6 from 6 countries | |
| Format | Single elimination tournament. | |
| Pos | Competitor | NOC | |||
|---|---|---|---|---|---|
| 1 | Keno Marley |  BRA | Gold | ||
| 2 | Farid Douibi |  ALG | Silver | ||
| 3 | Weerapon Jongjoho |  THA | Bronze | ||
| 4 | Jancen Poutoa |  SAM | |||
| =5 | Giodanny Jiménez |  VEN | |||
| =5 | Naichel Millas |  ITA |
Round One
| Date | 14 October 2018 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 14 Oct | Weerapon Jongjoho | THA | Decision | Naichel Millas | ITA | |
| Match #2 | 14 Oct | Jancen Poutoa | SAM | Decision | Giodanny Jiménez | VEN |
Quarter-Finals
| Date | 15 October 2018 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 15 Oct | Keno Marley | BRA | Walkover | Naichel Millas | ITA | |
| Match #2 | 15 Oct | Farid Douibi | ALG | Decision | Giodanny Jiménez | VEN |
Semi-Finals
| Date | 16 October 2018 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 16 Oct | Keno Marley | BRA | Decision | Weerapon Jongjoho | THA | |
| Match #2 | 16 Oct | Farid Douibi | ALG | Decision | Jancen Poutoa | SAM |
Final Round
| Date | 17 October 2018 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match 1/2 | 17 Oct | Keno Marley | BRA | Decision | Farid Douibi | ALG | |
| Match 3/4 | 17 Oct | Weerapon Jongjoho | THA | Decision | Jancen Poutoa | SAM | |
| Match 5/6 | 17 Oct | Giodanny Jiménez | VEN | Walkover | Naichel Millas | ITA |