CREATE TABLE table_49186 ("Date" CLOB, "Tournament" CLOB, "Surface" CLOB, "Opponent" CLOB, "Score" CLOB)

On what Surface was the match against Ilija Bozoljac played?
SELECT "Surface" FROM table_49186 WHERE "Opponent" = 'ilija bozoljac'
SELECT "Surface" FROM "table_49186" WHERE "Opponent" = 'ilija bozoljac'