CREATE TABLE table_78502 ("Outcome" TEXT, "Date" TEXT, "Tournament" TEXT, "Surface" TEXT, "Partner" TEXT, "Opponent in Final" TEXT, "Score in Final" TEXT)

Which partner was on 14 april 2013?
SELECT "Partner" FROM table_78502 WHERE "Date" = '14 april 2013'
SELECT "Partner" FROM "table_78502" WHERE "Date" = '14 april 2013'