user: Question: What is the date when the opponent in the final is Gastón Etlis Martín Rodríguez?
Columns: ['Date', 'Tournament', 'Surface', 'Partner', 'Opponents in the final', 'Score']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['6 February 2005', 'Viña del Mar , Chile', 'Clay', 'David Ferrer', 'Gastón Etlis Martín Rodríguez', '6–3, 6–4']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Opponents in the final" = 'Gastón Etlis Martín Rodríguez';