user: Question: which opponents in the U.S. Championships played after 1945 and had a score of 3–6, 6–4, 2–6, 6–3, 20–18?
Columns: ['Year', 'Championship', 'Partner', 'Opponents in the final', 'Score']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1942.0, 'U.S. Championships', 'Gardnar Mulloy', 'Ted Schroeder Sidney Wood', '9–7, 7–5, 6–1']
SQL:

assistant: SELECT "Opponents in the final" FROM "Table" WHERE "Championship" = 'U.S. Championships' AND "Year" > 1945.0 AND "Score" = '3–6, 6–4, 2–6, 6–3, 20–18';