The defending singles champions are Roger Federer of Switzerland and Svetlana Kuznetsova of Russia , who won their first United States Open titles by defeating Lleyton Hewitt of Australia and Elena Dementieva of Russia .
Roger Federer
Switzerland
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Lleyton Hewitt
Australia
/people/person/nationality
PERSON
Roger Federer
LOCATION
Switzerland
PERSON
Svetlana Kuznetsova
LOCATION
Russia
PERSON
Lleyton Hewitt
LOCATION
Australia
PERSON
Elena Dementieva
LOCATION
Russia