CREATE TABLE table_48013 ("Outcome" TEXT, "Date" TEXT, "Tournament" TEXT, "Surface" TEXT, "Opponent" TEXT, "Score" TEXT)

Who did Thomaz Bellucci play against when he became runner-up on a clay surface?
SELECT "Opponent" FROM table_48013 WHERE "Outcome" = 'runner-up' AND "Surface" = 'clay'
SELECT "Opponent" FROM "table_48013" WHERE "Outcome" = 'runner-up' AND "Surface" = 'clay'