Pairings for Round 4. 34th World Open!: 7-Day Under 1800 Section
| Bd | # | Res | White Player Name | # | Res | Black Player Name |
| 401 | 8 | | Davidian, David (3.0) | 4 | | Heinrich, Joel G (3.0) |
| 402 | 1 | | Johnson, Chuck (2.5) | 6 | | D'Onofrio, Lee C (2.0) |
| 403 | 14 | | Farley, Matthew T (2.0) | 12 | | Irizarry, Enrique (2.5) |
| 404 | 5 | | Beatty, Jimmie D (2.0) | 25 | | Tapper Jr, Leroy R (2.0) |
| 405 | 22 | | Westcott, Glenn S (2.0) | 19 | | Yuki, Osamu (2.0) |
| 406 | 23 | | Cremins, Edward D (1.5) | 3 | | Smith, Duane R (1.5) |
| 407 | 9 | | Ramos, Salvador (1.0) | 15 | | Bellia, Robert (1.0) |
| 408 | 10 | | Aneses, Omar (1.0) | 16 | | Sloan, Cecil (1.0) |
| 409 | 21 | | Bennett Sr, Roland (1.0) | 11 | | Pabon, Tony (1.0) |
| 410 | 17 | | Dusza, Richard S (0.0) | 13 | | Bardwell, Rodney (0.0) |
| 7 | ½ | Fields, Kanti J (2.0) | | | BYE |
| 18 | ½ | Wilson, Gregory S (2.0) | | | BYE |
| 20 | ½ | Fagliano, Joel Amo (0.5) | | | BYE |
| 24 | ½ | Lec, Patrick (1.0) | | | BYE |