Centuries By Mark Johnston-Allen In Season 1989-1990
| Tournament | Total | Breaks - Venue | Breaks - Qualifying | Rate |
|---|---|---|---|---|
 1990 World Championship |
3 | 126, 109, 101 | 13.33 | |
| 1989 UK Championship |
1 | 100 | 23 |
| Tournament | Total | Breaks - Venue | Breaks - Qualifying | Rate |
|---|---|---|---|---|
| 1990 World Championship |
3 | 126, 109, 101 | 13.33 | |
| 1989 UK Championship |
1 | 100 | 23 |