I totally agree with Serena Williams being SI Sportsperson of the Year.Serena became the first tennis player after Arthur Ashe in 1992,Chris Evert in 1976 and Billie Jean King in 1972.Yes Novak had an 'Incredible Year',still Serena was just two matches short of a Calendar Slam ,the last tennis player to achieve a Calendar Slam was Graf in 1986.Serena 53-3 in 2015,also taking into consideration her age at just 34 years young.If Novak had achieved his Career Slam at Roland Garos,I firmly believe he would have been named SI Sportsman of the Year.Some people have stated both Serena and Novak should have been named Co Winners,maybe.Congratulations Serena,you just keep on keeping on