CREATE TABLE table_61031 ("Outcome" TEXT, "Year" FLOAT, "Championship" TEXT, "Surface" TEXT, "Opponent" TEXT, "Score" TEXT)

What surface has indian wells as the championship, with winner as the outcome?
SELECT "Surface" FROM table_61031 WHERE "Championship" = 'indian wells' AND "Outcome" = 'winner'
SELECT "Surface" FROM "table_61031" WHERE "Championship" = 'indian wells' AND "Outcome" = 'winner'