user: Question: What year did Ivanovic win with Ivanovic greater than 4 and round of R16?
Columns: ['Year', 'Tournament', 'Surface', 'Round', 'Winner', 'Score', 'Length', 'Ivanovic', 'Jankovic']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'real', 'real']
Sample row: [2005.0, 'Zürich', 'Hard (i)', 'R16', 'Ivanovic', '6–2, 6–1', '0:51', 1.0, 0.0]
SQL:

assistant: SELECT "Year" FROM "Table" WHERE "Winner" = 'Ivanovic' AND "Ivanovic" > 4.0 AND "Round" = 'R16';