user: ### NOW ANSWER:
Question: Name the mens singles when mens doubles is George Georgoudis Gerostergiou
Columns: ['Year', 'Mens singles', 'Womens singles', 'Mens doubles', 'Womens doubles', 'Mixed doubles']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1990.0, 'George Tsavlakidis', 'Stephanie Giantsi', 'Charalambos Kazilas Stepan Partemian', 'Ruth Scott Stephanie Giantsi', 'Stepan Partemian Alexandra Georgaki']
SQL:

assistant: SELECT "Mens singles" FROM "Table" WHERE "Mens doubles" = 'George Georgoudis Gerostergiou';