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Chelsea matches where John Duncan was opposition manager/coach
| Date | Venue | Opponent | Score | Comp |
| 26/12/1988 | Stamford Bridge | Ipswich Town | 3-0 | Football League Division 2 |
| 28/03/1989 | Portman Road | Ipswich Town | 1-0 | Football League Division 2 |
| 23/01/1990 | Portman Road | Ipswich Town | 3-2 | Zenith Data Cup |