Am I correct that out of the last twenty years (big years for the two-handed backhand) 15 of those years the number one players had one-handed backhands?
# 1987: Flag of Czechoslovakia Ivan Lendl 3
# 1988: Flag of Sweden Mats Wilander
# 1989: Flag of Czechoslovakia Ivan Lendl 4
# 1990: Flag of Sweden Stefan Edberg
# 1991: Flag of Sweden Stefan Edberg 2
# 1992: Flag of the United States Jim Courier
# 1993: Flag of the United States Pete Sampras
# 1994: Flag of the United States Pete Sampras 2
# 1995: Flag of the United States Pete Sampras 3
# 1996: Flag of the United States Pete Sampras 4
# 1997: Flag of the United States Pete Sampras 5
# 1998: Flag of the United States Pete Sampras 6
# 1999: Flag of the United States Andre Agassi
# 2000: Flag of Brazil Gustavo Kuerten
# 2001: Flag of Australia Lleyton Hewitt
# 2002: Flag of Australia Lleyton Hewitt 2
# 2003: Flag of the United States Andy Roddick
# 2004: Flag of Switzerland Roger Federer
# 2005: Flag of Switzerland Roger Federer 2
# 2006: Flag of Switzerland Roger Federer 3
# 2007: Flag of Switzerland Roger Federer 4
# 1987: Flag of Czechoslovakia Ivan Lendl 3
# 1988: Flag of Sweden Mats Wilander
# 1989: Flag of Czechoslovakia Ivan Lendl 4
# 1990: Flag of Sweden Stefan Edberg
# 1991: Flag of Sweden Stefan Edberg 2
# 1992: Flag of the United States Jim Courier
# 1993: Flag of the United States Pete Sampras
# 1994: Flag of the United States Pete Sampras 2
# 1995: Flag of the United States Pete Sampras 3
# 1996: Flag of the United States Pete Sampras 4
# 1997: Flag of the United States Pete Sampras 5
# 1998: Flag of the United States Pete Sampras 6
# 1999: Flag of the United States Andre Agassi
# 2000: Flag of Brazil Gustavo Kuerten
# 2001: Flag of Australia Lleyton Hewitt
# 2002: Flag of Australia Lleyton Hewitt 2
# 2003: Flag of the United States Andy Roddick
# 2004: Flag of Switzerland Roger Federer
# 2005: Flag of Switzerland Roger Federer 2
# 2006: Flag of Switzerland Roger Federer 3
# 2007: Flag of Switzerland Roger Federer 4