| John Whitty defeated Ian Williamson |
1996 World Championship Snooker |
| Lee Mallen defeated Ian Williamson |
1996 British Open Snooker |
| Tom Finstad defeated Ian Williamson |
1995 Grand Prix Snooker |
| Ian Williamson defeated Mark Love |
1995 Grand Prix Snooker |
| Oliver King defeated Ian Williamson |
1995 World Championship Snooker |
| Ian Williamson defeated Carl Waters |
1995 World Championship Snooker |
| Ian Williamson defeated Anthony Buckley |
1995 World Championship Snooker |
| Richy McDonald defeated Ian Williamson |
1994 UK Championship Snooker |
| Ian Williamson defeated Jack Fitzmaurice |
1994 UK Championship Snooker |
| Warren King defeated Ian Williamson |
1994 World Championship Snooker |
| Ian Williamson defeated Chris Scanlon |
1994 World Championship Snooker |
| Neil Mosley defeated Ian Williamson |
1994 British Open Snooker |
| Ian Williamson defeated Robby Foldvari |
1994 British Open Snooker |
| Ian Williamson defeated Michael Duffy |
1994 British Open Snooker |
| Paul Watchorn defeated Ian Williamson |
1994 Thailand Open Snooker |
| Roger Leighton defeated Ian Williamson |
1994 International Open Snooker |
| Jamie Burnett defeated Ian Williamson |
1994 Welsh Open Snooker |
| Wayne Saidler defeated Ian Williamson |
1993 European Open Snooker |
| Steve Campbell defeated Ian Williamson |
1993 UK Championship Snooker |
| Ian Williamson defeated Dean Venables |
1993 UK Championship Snooker |
| Sergio Beggiato defeated Ian Williamson |
1993 Grand Prix Snooker |
| Jamie Burnett defeated Ian Williamson |
1993 Dubai Classic Snooker |
| Stephen O'Connor defeated Ian Williamson |
1993 World Championship Snooker |
| Steve Mifsud defeated Ian Williamson |
1993 International Open Snooker |
| Oliver King defeated Ian Williamson |
1993 Asian Open Snooker |
| Jason Wallace defeated Ian Williamson |
1993 British Open Snooker |
| Jamie Woodman defeated Ian Williamson |
1993 European Open Snooker |
| Ian Williamson defeated Matt Gibson |
1993 European Open Snooker |
| Steve Lemmens defeated Ian Williamson |
1993 Welsh Open Snooker |
| Robert Foxall defeated Ian Williamson |
1992 UK Championship Snooker |
| Joe Swail defeated Ian Williamson |
1992 Benson and Hedges Championship Snooker |
| Ian Williamson defeated Mark Williams (II) |
1992 Benson and Hedges Championship Snooker |
| Paul Morgan defeated Ian Williamson |
1992 Grand Prix Snooker |
| Peter Daubney defeated Ian Williamson |
1992 Dubai Classic Snooker |
| Ian Williamson defeated Cary Kikis |
1992 Dubai Classic Snooker |
| Jason Whittaker defeated Ian Williamson |
1992 World Championship Snooker |
| Ian Williamson defeated Fergal O'Brien |
1992 World Championship Snooker |
| John Shilton defeated Ian Williamson |
1992 European Open Snooker |
| Colin Morton defeated Ian Williamson |
1992 Strachan Open Snooker |
| Joe Swail defeated Ian Williamson |
1992 British Open Snooker |
| Paul McPhillips defeated Ian Williamson |
1992 Welsh Open Snooker |
| Jason Pegram defeated Ian Williamson |
1992 Asian Open Snooker |
| Jason Smith defeated Ian Williamson |
1992 Classic Snooker |
| Ian Williamson defeated Michael Kirkham |
1992 Classic Snooker |
| Paul Tanner defeated Ian Williamson |
1991 UK Championship Snooker |
| Kevin Young defeated Ian Williamson |
1991 Grand Prix Snooker |
| Darren Morgan defeated Ian Williamson |
1991 Dubai Classic Snooker |
| Ian Williamson defeated Joe Grech |
1991 Dubai Classic Snooker |
| Ian Williamson defeated Craig Newson |
1991 Dubai Classic Snooker |
| Paul Medati defeated Ian Williamson |
1991 World Championship Snooker |
| Steve Campbell defeated Ian Williamson |
1991 British Open Snooker |
| Craig Edwards defeated Ian Williamson |
1991 European Open Snooker |
| Ian Williamson defeated Dave Martin |
1991 European Open Snooker |
| Jimmy White defeated Ian Williamson |
1991 Classic Snooker |
| Ian Williamson defeated Craig Edwards |
1991 Classic Snooker |
| Ian Williamson defeated Steve Campbell |
1991 Classic Snooker |
| Darren Morgan defeated Ian Williamson |
1990 UK Championship Snooker |
| Ian Williamson defeated Marcel Gauvreau |
1990 UK Championship Snooker |
| Mike Hallett defeated Ian Williamson |
1990 Dubai Classic Snooker |
| Ian Williamson defeated Murdo Macleod |
1990 Dubai Classic Snooker |
| Ian Williamson defeated Jason Smith |
1990 Dubai Classic Snooker |
| Rex Williams defeated Ian Williamson |
1990 Asian Open Snooker |
| Ian Williamson defeated Marcel Gauvreau |
1990 Asian Open Snooker |
| Marcel Gauvreau defeated Ian Williamson |
1990 Grand Prix Snooker |
| Brian Morgan defeated Ian Williamson |
1990 World Championship Snooker |
| Nick Dyson defeated Ian Williamson |
1990 European Open Snooker |
| Steve Duggan defeated Ian Williamson |
1990 British Open Snooker |
| Ian Williamson defeated Geoff Foulds |
1990 British Open Snooker |
| Tommy Murphy defeated Ian Williamson |
1990 Classic Snooker |
| Ian Williamson defeated Steve Campbell |
1990 Classic Snooker |
| Joe O'Boye defeated Ian Williamson |
1989 UK Championship Snooker |
| Ian Williamson defeated Dennis Hughes |
1989 UK Championship Snooker |
| Duncan Campbell defeated Ian Williamson |
1989 Grand Prix Snooker |
| Bob Chaperon defeated Ian Williamson |
1989 International Open Snooker |
| Ian Williamson defeated Graham Cripsey |
1989 International Open Snooker |
| Dave Gilbert defeated Ian Williamson |
1989 Asian Open Snooker |
| Ian Williamson defeated Billy Kelly |
1989 Asian Open Snooker |
| Mike Darrington defeated Ian Williamson |
1989 Hong Kong Open Snooker |
| Joe Grech defeated Ian Williamson |
1989 World Championship Snooker |
| Ian Graham defeated Ian Williamson |
1989 British Open Snooker |
| Tony Knowles defeated Ian Williamson |
1989 English Professional Championship Snooker |
| Ian Williamson defeated Ken Owers |
1989 English Professional Championship Snooker |
| Ian Williamson defeated Steve Meakin |
1989 English Professional Championship Snooker |
| Ray Reardon defeated Ian Williamson |
1989 European Open Snooker |
| Ian Williamson defeated Dennis Hughes |
1989 European Open Snooker |
| Paddy Browne defeated Ian Williamson |
1989 Classic Snooker |
| Ian Williamson defeated Greg Jenkins |
1989 Classic Snooker |
| Joe O'Boye defeated Ian Williamson |
1988 UK Championship Snooker |
| Ian Williamson defeated Clive Everton |
1988 UK Championship Snooker |
| Marcel Gauvreau defeated Ian Williamson |
1988 Canadian Masters Snooker |
| Ian Williamson defeated Dave Chalmers |
1988 Canadian Masters Snooker |
| Stephen Hendry defeated Ian Williamson |
1988 Grand Prix Snooker |
| Ian Williamson defeated Jim Wych |
1988 Grand Prix Snooker |
| Ian Williamson defeated Clive Everton |
1988 Grand Prix Snooker |
| Craig Edwards defeated Ian Williamson |
1990 Benson and Hedges Satellite Championship Snooker |
| Les Dodd defeated Ian Williamson |
1989 Dubai Classic Snooker |
| Ian Williamson defeated Dennis Hughes |
1989 Dubai Classic Snooker |
| Jon Wright defeated Ian Williamson |
1988 International Open Snooker |
| Ian Williamson defeated Mike Darrington |
1988 International Open Snooker |
| Malcolm Bradley defeated Ian Williamson |
1988 World Championship Snooker |
| Ian Williamson defeated Joe Cagianello |
1988 World Championship Snooker |
| Mike Hallett defeated Ian Williamson |
1988 British Open Snooker |
| Ian Williamson defeated Malcolm Bradley |
1988 British Open Snooker |
| Ian Williamson defeated Steve Meakin |
1988 British Open Snooker |
| Steve Duggan defeated Ian Williamson |
1988 English Professional Championship Snooker |
| Ian Williamson defeated John Dunning |
1988 English Professional Championship Snooker |
| Dennis Hughes defeated Ian Williamson |
1988 Classic Snooker |
| Steve Duggan defeated Ian Williamson |
1987 UK Championship Snooker |
| Ian Williamson defeated Billy Kelly |
1987 UK Championship Snooker |
| Martin Clark defeated Ian Williamson |
1987 Grand Prix Snooker |
| Steve Longworth defeated Ian Williamson |
1987 International Open Snooker |
| Ian Williamson defeated Marcel Gauvreau |
1987 International Open Snooker |
| Ian Williamson defeated Clive Everton |
1987 International Open Snooker |
| Ian Black defeated Ian Williamson |
1987 World Championship Snooker |
| Warren King defeated Ian Williamson |
1987 British Open Snooker |
| Mike Hallett defeated Ian Williamson |
1987 English Professional Championship Snooker |
| Ian Williamson defeated David Roe |
1987 English Professional Championship Snooker |
| Cliff Wilson defeated Ian Williamson |
1987 Classic Snooker |
| Ian Williamson defeated Ray Edmonds |
1987 Classic Snooker |
| Dave Martin defeated Ian Williamson |
1986 UK Championship Snooker |
| Ian Williamson defeated Paddy Browne |
1986 UK Championship Snooker |
| Stephen Hendry defeated Ian Williamson |
1986 Grand Prix Snooker |
| John Spencer defeated Ian Williamson |
1986 International Open Snooker |
| Jimmy van Rensberg defeated Ian Williamson |
1986 World Championship Snooker |
| Tony Knowles defeated Ian Williamson |
1986 British Open Snooker |
| Ian Williamson defeated Graham Cripsey |
1986 British Open Snooker |
| Jimmy White defeated Ian Williamson |
1986 English Professional Championship Snooker |
| Ian Williamson defeated Maurice Parkin |
1986 English Professional Championship Snooker |
| John Rea defeated Ian Williamson |
1986 Classic Snooker |
| Bernie Mikkelsen defeated Ian Williamson |
1985 UK Championship Snooker |
| Dave Gilbert defeated Ian Williamson |
1985 Grand Prix Snooker |
| Bill Werbeniuk defeated Ian Williamson |
1985 Matchroom Trophy Snooker |
| Ian Williamson defeated Jack McLaughlin |
1985 Matchroom Trophy Snooker |
| Paul Medati defeated Ian Williamson |
1985 World Championship Snooker |
| Tony Chappel defeated Ian Williamson |
1985 British Open Snooker |
| Patsy Fagan defeated Ian Williamson |
1985 Classic Snooker |
| Ian Williamson defeated Tony Kearney |
1985 Classic Snooker |
| Peter Francisco defeated Ian Williamson |
1984 UK Championship Snooker |
| Malcolm Bradley defeated Ian Williamson |
1985 English Professional Championship Snooker |
| Tony Knowles defeated Ian Williamson |
1984 Grand Prix Snooker |
| Ian Williamson defeated Joe Johnson |
1984 Grand Prix Snooker |
| Ian Williamson defeated Bill Werbeniuk |
1984 Grand Prix Snooker |
| Ian Williamson defeated Paul Thornley |
1984 Grand Prix Snooker |
| Geoff Foulds defeated Ian Williamson |
1984 International Open Snooker |
| Ian Williamson defeated Vic Harris |
1984 International Open Snooker |
| Graham Miles defeated Ian Williamson |
1984 World Championship Snooker |
| Ian Williamson defeated Mike Hines |
1984 World Championship Snooker |
| Ian Williamson defeated Pat Houlihan |
1984 World Championship Snooker |
| Frank Jonik defeated Ian Williamson |
1984 Classic Snooker |
| Ian Williamson defeated Doug French |
1984 Classic Snooker |
| Ian Black defeated Ian Williamson |
1983 UK Championship Snooker |
| Ian Williamson defeated John Hargreaves |
1983 UK Championship Snooker |
| Jimmy White defeated Ian Williamson |
1983 Professional Players Tournament Snooker |
| Mike Darrington defeated Ian Williamson |
1983 International Open Snooker |
| Tony Wilson defeated Ian Williamson |
1990 International One Frame Shoot-out Snooker |
| Les Dodd defeated Ian Williamson |
1983 World Championship Snooker |
| Ian Williamson defeated Doug French |
1983 World Championship Snooker |
| Les Dodd defeated Ian Williamson |
1982 UK Championship Snooker |
| Billy Kelly defeated Ian Williamson |
1982 International Open Snooker |
| Ian Williamson defeated Jim Donnelly |
1982 International Open Snooker |
| Billy Kelly defeated Ian Williamson |
1984 International Masters Snooker |
| Ian Williamson defeated Jim Meadowcroft |
1984 International Masters Snooker |
| Dave Martin defeated Ian Williamson |
1980 Professional Ticket Event Snooker |
| Ian Williamson defeated Paul Medati |
1980 Professional Ticket Event Snooker |
| D Ireland defeated Ian Williamson |
1979 Canadian Open Snooker |