CREATE TABLE table_name_95 (year INT, round VARCHAR, winner VARCHAR)

What year did Ivanovic win with Ivanovic greater than 4 and round of R16?
SELECT SUM(year) FROM table_name_95 WHERE winner = "ivanovic" AND "ivanovic" > 4 AND round = "r16"
SELECT SUM("year") FROM "table_name_95" WHERE "ivanovic" = "winner" AND "ivanovic" > 4 AND "r16" = "round"