Joe Swail was beaten 10-1 by Joe O'Connor in the first round of the World Snooker Championship qualifiers.
The 49-year-old Northern Irishman suffered the heavy defeat to England's O'Connor at Sheffield's English Institute of Sport on Wednesday.
Swail, who reached the semi-finals of the tournament in 2000 and 2001, is currently ranked 87 in the world.
The qualifying stages are taking place from 10-17 April.
Swail's fellow Northern Irishman Mark Allen is seeded sixth for the World Championship.
The event starts on 20 April at the Crucible Theatre in Sheffield, with three-time champion Mark Williams looking to defend his title.