user: Question: What is Opponent in Final, when Surface is "Hard", and when Date is "13 January 1992"?
Columns: ['Date', 'Tournament', 'Surface', 'Opponent in Final', 'Score in Final']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['21 April 1986', 'Nice, France', 'Clay', 'Paul McNamee', '6–1, 6–3']
SQL:

assistant: SELECT "Opponent in Final" FROM "Table" WHERE "Surface" = 'Hard' AND "Date" = '13 January 1992';