Schoenfield later claimed that an official had accused him of having taken drugs , an allegation that he denied .
Grand Prix supervisor Dick Robertson stepped in when Schoenfield trailed 0 -- 4 in the first set and ruled that his play was not up to professional standards .
Schoenfield later claimed that an official had accused Schoenfield of having taken drugs , an allegation that Schoenfield denied .
Grand Prix supervisor Dick Robertson stepped in when Schoenfield trailed 0 -- 4 in the first set and ruled that his play was not up to professional standards .