user: Question: What is the highest sd when the status is Second round lost to Iveta Benešová?
Columns: ['Sd', 'Rk', 'Player', 'Points', 'Points defending', 'Points won', 'New points', 'Status']
Types: ['real', 'real', 'text', 'real', 'real', 'real', 'real', 'text']
Sample row: [1.0, 1.0, 'Caroline Wozniacki', 8035.0, 280.0, 900.0, 8655.0, 'Semifinals lost to Li Na']
SQL:

assistant: SELECT MAX("Sd") FROM "Table" WHERE "Status" = 'Second round lost to Iveta Benešová';