CREATE TABLE table_name_44 (score VARCHAR, opponent VARCHAR, date VARCHAR)

What was the score of the match against roger federer on April 3, 2006?
SELECT score FROM table_name_44 WHERE opponent = "roger federer" AND date = "april 3, 2006"
SELECT "score" FROM "table_name_44" WHERE "april 3, 2006" = "date" AND "opponent" = "roger federer"