user: Question: What is the date of the match with a Winner outcome and Jim Courier as the opponent in the final?
Columns: ['Outcome', 'Date', 'Championship', 'Surface', 'Opponent in the final', 'Score in the final']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Runner-up', '30 August 1993', 'Umag , Croatia', 'Clay', 'Thomas Muster', '5–7, 6–3, 3–6']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Outcome" = 'Winner' AND "Opponent in the final" = 'Jim Courier';