The 1986 Rothmans Grand Prix was a professional ranking snooker tournament that took place from 18 to 26 October 1986 at the Hexagon Theatre in Reading.

He was 53 years and 98 days old, making him the oldest player in a ranking final.

He had beaten Jim Bear, Mark Wildman, Alex Higgins, Steve Davis and Neal Foulds before facing Jimmy White in the final.

[5] During that match Williams took a 5–2 lead which he had made a break of 125 in the 7th frame and 6–4 before White took the last 6 frames to win his first Grand Prix title by 10–6.

White had beaten 17-year-old Stephen Hendry in the quarter-finals and Silvino Francisco in the semi-final.