user: Question: How many Sets did gary muller have?
Columns: ['Aces', 'Player', 'Opponent', 'Event', 'Sets']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [113.0, 'John Isner', 'Nicolas Mahut', '2010 Wimbledon', 5.0]
SQL:

assistant: SELECT SUM("Sets") FROM "Table" WHERE "Player" = 'gary muller';