Question: Name the number of year for 6–3, 6–2 Hard surface
SQL: SELECT COUNT("Year") FROM "1-23235767-4" WHERE "Score in the final" = '6–3, 6–2' AND "Surface" = 'Hard';

Question: Name the surface for Philadelphia
SQL: SELECT "Surface" FROM "1-23235767-4" WHERE "Championship" = 'Philadelphia';

Question: Name the championship for Clay and Corrado Barazzutti
SQL: SELECT "Championship" FROM "1-23235767-4" WHERE "Surface" = 'Clay' AND "Opponent in the final" = 'Corrado Barazzutti';

Question: Name the year for Clay for Boston and Guillermo Vilas
SQL: SELECT "Year" FROM "1-23235767-4" WHERE "Surface" = 'Clay' AND "Championship" = 'Boston' AND "Opponent in the final" = 'Guillermo Vilas';

Question: Name the total number of opponent in the final for 6–2, 6–1, 6–3
SQL: SELECT COUNT("Opponent in the final") FROM "1-23235767-4" WHERE "Score in the final" = '6–2, 6–1, 6–3';