| | Top level | Event type
Shortboard, Men – Quarter-Finals
| Date | 27 July 2021 — 7:00 | |
|---|---|---|
| Location | Tsurigasaki Surfing Beach, Torami, Chiba | |
| Format | Winners advance to semi-finals. | |
| Head Judge | Glen Elliott |  AUS |
| Head Judge | Richard Pierce |  USA |
| Judge 1 | Luiz Pereira |  BRA |
| Judge 2 | Dan Kosoof |  NZL |
| Judge 3 | Tory Gilkerson | USA |
| Judge 4 | Benjamin Lowe | AUS |
| Judge 5 | Bruno Truch |  FRA |
| Judge 6 | Masato Kato |  JPN |
| Judge 7 | Nuno Trigo |  POR |
Heat #1
| Time | 7:00 |
|---|
| Pos | Competitor | NOC | Points | Best Wave | Second-Best Wave | Wave 1 | Wave 2 | Wave 3 | Wave 4 | Wave 5 | Wave 6 | Wave 7 | Wave 8 | Wave 9 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Kanoa Igarashi | JPN | 12.60 | 6.67 | 5.93 | 5.33 | 6.67 | 0.50 | 5.93 | 0.83 | 2.33 | 4.53 | – | – | ||
| 2 | Kolohe Andino | USA | 11.00 | 5.77 | 5.23 | 5.23 | 0.87 | 0.47 | 0.43 | 5.77 | 0.50 | 3.17 | 0.27 | 1.00 |
Heat #2
| Time | 7:36 |
|---|
| Pos | Competitor | NOC | Points | Best Wave | Second-Best Wave | Wave 1 | Wave 2 | Wave 3 | Wave 4 | Wave 5 | Wave 6 | Wave 7 | Wave 8 | Wave 9 | Wave 10 | Wave 11 | Wave 12 | Wave 13 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Gabriel Medina | BRA | 15.33 | 9.00 | 6.33 | 0.50 | 0.43 | 0.63 | 1.27 | 6.33 | 2.00 | 9.00 | 0.57 | 4.60 | 1.13 | 0.47 | 4.07 | 1.00 | ||
| 2 | Michel Bourez | FRA | 13.66 | 6.93 | 6.73 | 2.67 | 0.50 | 0.37 | 1.00 | 6.73 | 0.50 | 6.93 | 0.43 | 0.70 | – | – | – | – |
Heat #3
| Time | 8:12 |
|---|
| Pos | Competitor | NOC | Points | Best Wave | Second-Best Wave | Wave 1 | Wave 2 | Wave 3 | Wave 4 | Wave 5 | Wave 6 | Wave 7 | Wave 8 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Ítalo Ferreira | BRA | 16.30 | 9.74 | 6.57 | 9.73 | 0.70 | 3.50 | 5.00 | 1.10 | 6.43 | 6.57 | 0.73 | ||
| 2 | Hiroto Ohhara | JPN | 11.90 | 6.73 | 5.17 | 2.83 | 5.17 | 1.00 | 0.93 | 0.50 | 0.40 | 6.73 | – |
Heat #4
| Time | 8:48 |
|---|
| Pos | Competitor | NOC | Points | Best Wave | Second-Best Wave | Wave 1 | Wave 2 | Wave 3 | Wave 4 | Wave 5 | Wave 6 | Wave 7 | Wave 8 | Wave 9 | Wave 10 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Owen Wright | AUS | 12.74 | 6.67 | 6.07 | 2.83 | 6.67 | 6.07 | – | – | – | – | – | – | – | ||
| 2 | Lucca Mesinas |  PER | 7.83 | 4.10 | 3.73 | 3.67 | 0.50 | 0.30 | 0.53 | 0.60 | 0.87 | 3.73 | 1.00 | 3.53 | 4.10 |