user: Question: What are the maximum points defended when points won are smaller than 720.0?
Columns: ['Sd', 'Rk', 'Player', 'Points', 'Points defending', 'Points won', 'New points', 'Status']
Types: ['real', 'real', 'text', 'real', 'real', 'real', 'real', 'text']
Sample row: [2.0, 2.0, 'Rafael Nadal', 9595.0, 360.0, 1200.0, 10435.0, 'Runner-up, Final lost to Novak Djokovic [1]']
SQL:

assistant: SELECT MAX("Points defending") FROM "Table" WHERE "Points won" < 720.0;