user: ### NOW ANSWER:
Question: At what age did Roy Emerson complete the Grand Slam?
Columns: ['#', 'Player', 'Age', 'Australian Open', 'French Open', 'Wimbledon', 'US Open']
Types: ['real', 'text', 'real', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'Fred Perry', 26.0, 1934.0, 1935.0, 1934.0, 1933.0]
SQL:

assistant: SELECT MAX("Age") FROM "Table" WHERE "Player" = 'Roy Emerson';