user: Question: What date has the opponent competing in the final of John McEnroe?
Columns: ['Date', 'Tournament', 'Surface', 'Opponent in Final', 'Score in Final']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['18 March 1985', 'Rotterdam', 'Carpet', 'Jakob Hlasek', '6–1, 6–2']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Opponent in Final" = 'John McEnroe';