shocked to see the unseeded player put an end to her 33-match winning streak. >> this is one of the hugest upsets in all of tennis history. roberta vinci had not beaten serena williams. >> for williams she batted her sister venus on tuesday and after that match admitted to being tired. >> waking up early to practice not making it super enjoyable. >> reporter: williams has always been a fan favorite. a cinderella story out of the rough streets of compton, california. she's already won the serena slam, four majors in a row, just not in a calendar year, something she pointed out to journalists. >> i did win three grand slams this year, four in a row which is pretty good. >> reporter: on the men's side, few surprises. number one novak djokovic against roger federer.