user: Question: Who was the opponent when the score was 6-3, 6-3?
Columns: ['Outcome', 'Tournament', 'Surface', 'Opponent', 'Score']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Runner-up', 'Australia F4, Bairnsdale, Australia', 'Clay', 'Konstantinos Economidis', '3-6, 2-6']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Score" = '6-3, 6-3';