 Complete the following phrase:  Higgins had been banned from competing in the first two ranking tournaments of the 19871988 season, and this was the first year since the rankings were instituted in a hrefSnooker20world20rankings201976197719761977a that he was not among the top 16. In May 1988, Cliff Thorburn had two ranking points deducted for bringing the game into disrepute due to failing a drugs test at the 