| | Event type
≤55 kilograms, Boys
| Date | 7 October 2018 | |
|---|---|---|
| Status | YOG | |
| Location | Asia Pavilion, Parque Olímpico de la Juventud, Villa Soldati, Buenos Aires | |
| Participants | 12 from 12 countries | |
| Format | Single-elimination tournament. Those losing to finalists compete in repechage for bronze medals. | |
| Pos | Competitor | NOC | |||
|---|---|---|---|---|---|
| 1 | Artsiom Kolasau |  BLR | Gold | ||
| 2 | Ganbürged Temüüjin |  MGL | Silver | ||
| =3 | Daniel Leutgeb |  AUT | Bronze | ||
| =3 | Oleh Veredyba |  UKR | Bronze | ||
| =5 | Romain Valadier Picard |  FRA | |||
| =5 | Ariel Shulman |  ISR | |||
| =7 | Bryan Garboa |  ECU | |||
| =7 | Aleddine Ben Chalbi |  TUN | |||
| =9 | Yuri Israelyan |  ARM | |||
| =9 | Juan Montealegre |  COL | |||
| =9 | Euclides Lopes |  GBS | |||
| =9 | Adrián Medero |  PUR |
Round One
| Date | 7 October 2018 |
|---|
Round One
| Date | 7 October 2018 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 07 Oct | Artsiom Kolasau | BLR | bye | |||
| Match #2 | 07 Oct | Romain Valadier Picard | FRA | 1 | Adrián Medero | PUR | |
| Match #3 | 07 Oct | Aleddine Ben Chalbi | TUN | bye | |||
| Match #4 | 07 Oct | Daniel Leutgeb | AUT | 1 | Euclides Lopes | GBS | |
| Match #5 | 07 Oct | Bryan Garboa | ECU | bye | |||
| Match #6 | 07 Oct | Oleh Veredyba | UKR | 1 | Ariel Shulman | ISR | |
| Match #7 | 07 Oct | Ganbürged Temüüjin | MGL | bye | |||
| Match #8 | 07 Oct | Juan Montealegre | COL | 0 | Yuri Israelyan | ARM |
Quarter-Finals
| Date | 7 October 2018 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 07 Oct | Artsiom Kolasau | BLR | 1 | Romain Valadier Picard | FRA | |
| Match #2 | 07 Oct | Daniel Leutgeb | AUT | 1 | Aleddine Ben Chalbi | TUN | |
| Match #3 | 07 Oct | Oleh Veredyba | UKR | 1 | Bryan Garboa | ECU | |
| Match #4 | 07 Oct | Ganbürged Temüüjin | MGL | 1 | Juan Montealegre | COL |
Semi-Finals
| Date | 7 October 2018 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 07 Oct | Artsiom Kolasau | BLR | 1 | Daniel Leutgeb | AUT | |
| Match #2 | 07 Oct | Ganbürged Temüüjin | MGL | 1 | Oleh Veredyba | UKR |
Repêchage Round One
| Date | 7 October 2018 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 07 Oct | Aleddine Ben Chalbi | TUN | 1 | Adrián Medero | PUR | |
| Match #2 | 07 Oct | Romain Valadier Picard | FRA | 1 | Euclides Lopes | GBS | |
| Match #3 | 07 Oct | Ariel Shulman | ISR | 1 | Juan Montealegre | COL | |
| Match #4 | 07 Oct | Bryan Garboa | ECU | 1 | Yuri Israelyan | ARM |
Repêchage Semi-Finals
| Date | 7 October 2018 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 07 Oct | Romain Valadier Picard | FRA | 0 | Aleddine Ben Chalbi | TUN | |
| Match #2 | 07 Oct | Ariel Shulman | ISR | 1 | Bryan Garboa | ECU |
Final Round
| Date | 7 October 2018 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match 1/2 | 07 Oct | Artsiom Kolasau | BLR | 1 | Ganbürged Temüüjin | MGL | |
| Match 3/5 | 07 Oct | Oleh Veredyba | UKR | 1 | Romain Valadier Picard | FRA | |
| Match 3/5 | 07 Oct | Daniel Leutgeb | AUT | 1 | Ariel Shulman | ISR |