CREATE TABLE table_26417 ("Outcome" CLOB, "Year" FLOAT, "Championship" CLOB, "Surface" CLOB, "Partner" CLOB, "Opponents" CLOB, "Score" CLOB)

Name the surface for cara black rennae stubbs
SELECT "Surface" FROM table_26417 WHERE "Opponents" = 'Cara Black Rennae Stubbs'
SELECT "Surface" FROM "table_26417" WHERE "Opponents" = 'Cara Black Rennae Stubbs'