Pairings of round 4 - 2021-10-15 - 20:00
| Brd. | White | Ran. | Pts. | FIDE | Fed. | Res. | Black | Ran. | Pts. | FIDE | Fed. |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Bartolome Benito, Alejandro | 4 | 3.0 | 1264 | ESP | 1-0 | Arevillca Colque, Jonatan | 8 | 3.0 | 1115 | ESP |
| 2 | Xia, Yu Jeremy | 16 | 2.0 | 0 | ESP | 0-1 | Herrero Guirau, Carlos | 1 | 2.0 | 1340 | ESP |
| 3 | Palomo Monserrat, Lorenzo | 2 | 2.0 | 1303 | ESP | 1-0 | Ibanez Valentin, Gabriel | 6 | 2.0 | 1138 | ESP |
| 4 | Romanos Casado, Dario | 9 | 2.0 | 1092 | ESP | 0-1 | Xia, Zhe | 5 | 2.0 | 1171 | ESP |
| 5 | Xia, Alba Yuqi | 15 | 1.0 | 0 | ESP | 0-1 | Plaza Plaza, Prudencio | 3 | 1.0 | 1287 | ESP |
| 6 | Xia, Yan | 7 | 1.0 | 1117 | ESP | 1-0 | Munecas Munoz, Carlos | 13 | 1.0 | 0 | ESP |
| 7 | Bustos Sanchez, Felipe Antonio | 10 | 1.0 | 0 | ESP | 1-0 | Morales Clares, Aaron | 12 | 1.0 | 0 | ESP |
| 8 | Liu, Kevin | 11 | 0.0 | 0 | ESP | 0-1 | Nocigan, Lucas-Madalin | 14 | 0.0 | 0 | ROU |