| Result | Tournament |
|---|---|
| Allister Carter defeated Mark Johnston-Allen | 2000 World Championship Snooker |
| Mark Johnston-Allen defeated John Burns | 2000 World Championship Snooker |
| Mark Johnston-Allen defeated Mark Weston | 2000 World Championship Snooker |
| Joe Perry defeated Mark Johnston-Allen | 1999 World Championship Snooker |
| Mark Johnston-Allen defeated Antony Bolsover | 1999 World Championship Snooker |
| Mark Johnston-Allen defeated John Burns | 1999 World Championship Snooker |
| Mark Johnston-Allen defeated Darren Swinburn | 1999 World Championship Snooker |
| Antony Bolsover defeated Mark Johnston-Allen | 1999 Welsh Open Snooker |
| Mark Johnston-Allen defeated Ben Reicker | 1999 Welsh Open Snooker |
| Barry Mapstone defeated Mark Johnston-Allen | 1999 Thailand Masters Snooker |
| Mark Johnston-Allen defeated Anan Terananon | 1999 Thailand Masters Snooker |
| Craig Harrison defeated Mark Johnston-Allen | 1999 Scottish Open Snooker |
| Mark Johnston-Allen defeated Darren Hackeson | 1999 Scottish Open Snooker |
| Mark Fenton defeated Mark Johnston-Allen | 1999 China International Snooker |
| Mark Johnston-Allen defeated Saleh Mohammad | 1999 China International Snooker |
| Tai Pichit defeated Mark Johnston-Allen | 1999 British Open Snooker |
| Simon Bedford defeated Mark Johnston-Allen | 1998 World Championship Snooker |
| Mark Johnston-Allen defeated Joe O'Boye | 1998 World Championship Snooker |
| Mark Johnston-Allen defeated Myles Deleuse | 1998 World Championship Snooker |
| Jason Weston defeated Mark Johnston-Allen | 1998 UK Tour - Event 5 Snooker |
| Mark Johnston-Allen defeated Wayne Saidler | 1998 UK Tour - Event 5 Snooker |
| Mark Johnston-Allen defeated Alan Burnett | 1998 UK Tour - Event 5 Snooker |
| James Reynolds defeated Mark Johnston-Allen | 1998 UK Tour - Event 4 Snooker |
| Simon Bedford defeated Mark Johnston-Allen | 1998 UK Tour - Event 3 Snooker |
| Paul Sweeny defeated Mark Johnston-Allen | 1998 UK Tour - Event 2 Snooker |
| Neil Tomkins defeated Mark Johnston-Allen | 1998 UK Tour - Event 1 Snooker |
| Steve Mifsud defeated Mark Johnston-Allen | 1998 UK Championship Snooker |
| Jason Wallace defeated Mark Johnston-Allen | 1998 Irish Open Snooker |
| Mark Johnston-Allen defeated Mario Cutajar | 1998 Irish Open Snooker |
| Fergal O'Brien defeated Mark Johnston-Allen | 1998 Grand Prix Snooker |
| Mark Johnston-Allen defeated Willie Thorne | 1998 Grand Prix Snooker |
| Mark Johnston-Allen defeated Peter McCullagh | 1998 Grand Prix Snooker |
| Mark Johnston-Allen defeated Micky Roughan | 1998 Grand Prix Snooker |
| Mark Johnston-Allen defeated Bob Chaperon | 1998 Grand Prix Snooker |
| Matthew Stevens defeated Mark Johnston-Allen | 1998 Benson and Hedges Championship Snooker |
| Mark Johnston-Allen defeated Stephen Kershaw | 1998 Benson and Hedges Championship Snooker |
| Paul Davison defeated Mark Johnston-Allen | 1997 World Championship Snooker |
| Mick Price defeated Mark Johnston-Allen | 1997 Welsh Open Snooker |
| Mark Johnston-Allen defeated Paul Hunter | 1997 Welsh Open Snooker |
| Peter Lines defeated Mark Johnston-Allen | 1997 Thailand Open Snooker |
| John Whitty defeated Mark Johnston-Allen | 1997 Qualifying School - Event 4 Snooker |
| Quinten Hann defeated Mark Johnston-Allen | 1997 Qualifying School - Event 3 Snooker |
| Mark Johnston-Allen defeated Brian Rowswell | 1997 Qualifying School - Event 3 Snooker |
| Mark Johnston-Allen defeated Mike Dunn | 1997 Qualifying School - Event 3 Snooker |
| Les Dodd defeated Mark Johnston-Allen | 1997 Qualifying School - Event 2 Snooker |
| Mark Johnston-Allen defeated Patrick Wallace | 1997 Qualifying School - Event 2 Snooker |
| Steve Meakin defeated Mark Johnston-Allen | 1997 Qualifying School - Event 1 Snooker |
| Peter Ebdon defeated Mark Johnston-Allen | 1997 International Open Snooker |
| Mark Johnston-Allen defeated Nigel Gilbert | 1997 International Open Snooker |
| Ian Brumby defeated Mark Johnston-Allen | 1997 European Open Snooker |