user: Question: What is the Champion at Sopot prior to 2006 with a Score of 6–4, 6–7(7), 6–3?
Columns: ['Location', 'Year', 'Champion', 'Runner-up', 'Score']
Types: ['text', 'real', 'text', 'text', 'text']
Sample row: ['Warsaw', 2008.0, 'Mariusz Fyrstenberg Marcin Matkowski', 'Nikolay Davydenko Yuri Schukin', '6–0, 3–6, [10–4]']
SQL:

assistant: SELECT "Champion" FROM "Table" WHERE "Location" = 'Sopot' AND "Year" < 2006.0 AND "Score" = '6–4, 6–7(7), 6–3';