List of US Open men's singles champions

Columns: Country | Amateur Era | Open Era | All-time | First title | Last title
United States ( USA ) | 66 | 19 | 85 | 1881 | 2003 | Australia ( AUS ) | 12 | 6 | 18 | 1951 | 2001 | Spain ( ESP ) | 1 | 5 | 6 | 1965 | 2019 | Switzerland ( SUI ) | 0 | 6 | 6 | 2004 | 2016 | Great Britain ( GBR ) | 4 | 1 | 5 | 1903 | 2012 | Czechoslovakia ( TCH ) ¤ | 0 | 3 | 3 | 1985 | 1987 | France ( FRA ) | 3 | 0 | 3 | 1926 | 1928 | Serbia ( SRB ) | 0 | 3 | 3 | 2011 | 2018

Example questions:
What is the open era of the US Open men 's singles of the country that covers more than one-eighth of the Earth 's inhabited land area ? | What is the first title year at the US Open men 's singles championships of the country that also includes two archipelagoes ? | What is the country whose last title year was the second consecutive US Open men 's singles championships final defeat for Sampras ? | What is the Amateur Era at the US Open men 's singles championships of the country that existed from October 1918 to 1 January 1993 ?

Answers:
1 | 1965 | Australia | 0