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In page John Spencer (snooker player):

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In 1971 and 1972, four events sponsored by Park Drive (the Park Drive 2000) were held where each of the four players involved played nine matches, the top two placed professionals playing a final match. Spencer won three of these events and lost the fourth only 3–4[2]:90 in the final to Ray Reardon with whom he battled for supremacy throughout the 1970s as snooker emerged from a phase of obscurity to become one of Britain’s most popular sports. From 1969 to 1978, only three players defeated Spencer in the World Championship (Ray Reardon, Alex Higgins and Perrie Mans) and from 1973 to 1977 he did not lose a World Championship match by more than two frames.