What was the surface for Adrian Ungur as an opponent?
CREATE TABLE table_name_86 (surface VARCHAR, opponent VARCHAR)
SELECT surface FROM table_name_86 WHERE opponent = "adrian ungur"
### Context: CREATE TABLE table_name_86 (surface VARCHAR, opponent VARCHAR) ### Question: What was the surface for Adrian Ungur as an opponent? ### Answer: SELECT surface FROM table_name_86 WHERE opponent = "adrian ungur"