CREATE TABLE table_29658 ("Outcome" TEXT, "Year" FLOAT, "Tournament" TEXT, "Surface" TEXT, "Partner" TEXT, "Opponents" TEXT, "Score" TEXT)

Who were Petrova's opponents with Vania King?
SELECT "Opponents" FROM table_29658 WHERE "Partner" = 'Vania King'
SELECT "Opponents" FROM "table_29658" WHERE "Partner" = 'Vania King'