CREATE TABLE table_75928 ("Outcome" CLOB, "Year" FLOAT, "Championship" CLOB, "Surface" CLOB, "Opponent" CLOB, "Score" CLOB)

What is the outcome of the match with Roger Federer as the opponent?
SELECT "Outcome" FROM table_75928 WHERE "Opponent" = 'roger federer'
SELECT "Outcome" FROM "table_75928" WHERE "Opponent" = 'roger federer'