CREATE TABLE table_71831 ("Date" CLOB, "Tournament" CLOB, "Surface" CLOB, "Opponent in the Final" CLOB, "Score in the Final" CLOB)

When did Mathieu play against Antonio Vei ?
SELECT "Date" FROM table_71831 WHERE "Opponent in the Final" = 'antonio veić'
SELECT "Date" FROM "table_71831" WHERE "Opponent in the Final" = 'antonio veić'