What type of surface was used for the game played on September 20, 1993?
CREATE TABLE table_name_93 (surface VARCHAR, date VARCHAR)
SELECT surface FROM table_name_93 WHERE date = "september 20, 1993"
### Context: CREATE TABLE table_name_93 (surface VARCHAR, date VARCHAR) ### Question: What type of surface was used for the game played on September 20, 1993? ### Answer: SELECT surface FROM table_name_93 WHERE date = "september 20, 1993"