| Result | Tournament |
|---|---|
| Rod Lawler defeated Derek Mienie | 1991 World Championship Snooker |
| Pat Houlihan defeated Derek Mienie | 1990 World Championship Snooker |
| Derek Mienie defeated Jim Meadowcroft | 1990 World Championship Snooker |
| Jim Meadowcroft defeated Derek Mienie | 1989 World Championship Snooker |
| Derek Mienie defeated Vladimir Potazsnyk | 1989 World Championship Snooker |
| Perrie Mans defeated Derek Mienie | 1989 South African Professional Championship Snooker |
| Stephen Murphy defeated Derek Mienie | 1989 Professional Play-offs Snooker |
| Jim Chambers defeated Derek Mienie | 1989 Classic Snooker |
| Jim Bear defeated Derek Mienie | 1988 World Championship Snooker |
| Mark Wildman defeated Derek Mienie | 1988 UK Championship Snooker |
| Tony Wilson defeated Derek Mienie | 1988 Professional Play-offs Snooker |
| Glen Wilkinson defeated Derek Mienie | 1988 International Open Snooker |
| Dave Gilbert defeated Derek Mienie | 1988 Grand Prix Snooker |
| Derek Mienie defeated Jim Meadowcroft | 1988 Grand Prix Snooker |
| Jim Meadowcroft defeated Derek Mienie | 1987 World Championship Snooker |
| Graham Cripsey defeated Derek Mienie | 1987 Classic Snooker |
| Derek Mienie defeated John Hargreaves | 1987 Classic Snooker |
| Colin Roscoe defeated Derek Mienie | 1987 British Open Snooker |
| Paul Thornley defeated Derek Mienie | 1986 World Championship Snooker |
| Greg Jenkins defeated Derek Mienie | 1986 UK Championship Snooker |
| Jimmy van Rensberg defeated Derek Mienie | 1986 South African Professional Championship Snooker |
| Derek Mienie defeated Mike Hines | 1986 South African Professional Championship Snooker |
| Bill Oliver defeated Derek Mienie | 1986 International Open Snooker |
| Matt Gibson defeated Derek Mienie | 1986 Grand Prix Snooker |
| Derek Mienie defeated Jack Fitzmaurice | 1986 Grand Prix Snooker |
| Martin Smith defeated Derek Mienie | 1986 Classic Snooker |
| Tony Drago defeated Derek Mienie | 1986 British Open Snooker |
| Malcolm Bradley defeated Derek Mienie | 1985 World Championship Snooker |
| John Hargreaves defeated Derek Mienie | 1985 UK Championship Snooker |
| Patsy Fagan defeated Derek Mienie | 1985 Matchroom Trophy Snooker |
| Derek Mienie defeated Gerry Watson | 1985 Matchroom Trophy Snooker |
| Sakchai Sim Ngam defeated Derek Mienie | 1985 Grand Prix Snooker |
| Ray Edmonds defeated Derek Mienie | 1985 British Open Snooker |
| Eugene Hughes defeated Derek Mienie | 1982 World Championship Snooker |
| Eddie Sinclair defeated Derek Mienie | 1980 World Championship Snooker |
| Doug Mountjoy defeated Derek Mienie | 1979 World Championship Snooker |
| Derek Mienie defeated Jimmy van Rensberg | 1979 South African Professional Championship Snooker |
| Derek Mienie defeated Perrie Mans | 1979 South African Professional Championship Snooker |
| Derek Mienie defeated Mannie Francisco | 1979 South African Professional Championship Snooker |