Doug Mountjoy was a Welsh snooker player from Tir-y-Berth, Gelligaer, Wales. He was a member of the professional snooker circuit from the late 1970s and throughout the 1980s, and remained within the top 16 of the world rankings for 11 consecutive years. He began his professional snooker career by taking the 1977 Masters, which he entered as a reserve player. He won both the 1978 UK Championship and the 1979 Irish Masters. Mountjoy reached the final of the 1981 World Snooker Championship where he was defeated by Steve Davis. He was also runner-up at the 1985 Masters losing to Cliff Thorburn, but by 1988 he had dropped out of the top 16.

The 1981 World Snooker Championship was a ranking professional snooker tournament which took place from 7 April to 20 April 1981 at the Crucible Theatre in Sheffield, England. The tournament was the 1981 edition of the World Snooker Championship, and was the fifth consecutive world championship to take place at the Crucible Theatre since 1977. It was sanctioned by the World Professional Billiards and Snooker Association. The total prize fund for the tournament was £75,000, of which £20,000 went to the winner.