CREATE TABLE table_12949 ("Date" CLOB, "Tournament" CLOB, "Surface" CLOB, "Opponent" CLOB, "Score" CLOB)

When was varvara lepchenko the opponent?
SELECT "Date" FROM table_12949 WHERE "Opponent" = 'varvara lepchenko'
SELECT "Date" FROM "table_12949" WHERE "Opponent" = 'varvara lepchenko'