Name the mens doubles for dimitrij ovtcharov
CREATE TABLE "brazil_open" (
  "year_location" text,
  "mens_singles" text,
  "womens_singles" text,
  "mens_doubles" text,
  "womens_doubles" text
);
SELECT "mens_doubles" FROM "brazil_open" WHERE "mens_singles"='Dimitrij Ovtcharov';