CREATE TABLE table_8739 ("Outcome" TEXT, "Year" FLOAT, "Championship" TEXT, "Surface" TEXT, "Partner" TEXT, "Opponents in final" TEXT, "Score in final" TEXT)

What is Surface, when Opponents, when Final is 'Gigi Fern ndez Robin White'?
SELECT "Surface" FROM table_8739 WHERE "Opponents in final" = 'gigi fernández robin white'
SELECT "Surface" FROM "table_8739" WHERE "Opponents in final" = 'gigi fernández robin white'