Narrowest Margin of Wickets Defeat
| 1 wicket | by Leicestershire | Grace Road, Leicester | 1971 | a518 |
| 1 wicket | by Yorkshire | County Ground, Derby | 1981 | a2924 |
| 1 wicket | by Hampshire | United Services Ground, Portsmouth | 1982 | a3338 |
| 1 wicket | by Essex | County Ground, Derby | 1984 | a4191 |
| 1 wicket | by Warwickshire | County Ground, Derby | 1997 | a10502 |
| 1 wicket | by Worcestershire | County Ground, New Road, Worcester | 1998 | a11137 |
| 1 wicket | by Glamorgan | County Ground, Derby | 2000 | a12913 |
| 1 wicket | by Lancashire | Stanley Park, Blackpool | 2002 | a14403 |
| 1 wicket | by Surrey | County Ground, Derby | 2002 | a14522 |
| 1 wicket | by Nottinghamshire | Trent Bridge, Nottingham | 2003 | a15084 |
| 1 wicket | by Gloucestershire | County Ground, Bristol | 2003 | a15245 |
| 1 wicket | by Hampshire | The Rose Bowl, Southampton | 2006 | a17563 |
| 1 wicket | by Leicestershire | County Ground, Derby | 2007 | a18321 |
| 1 wicket | by Yorkshire | Queen's Park, Chesterfield | 2022 | a29407 |
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