Categories Articles A 19-year-old Canadian beat Serena Williams in the Rogers Cup final after the veteran American retired after 4 games because of back spasms Post author By crystalg Post date August 13, 2019 Business Insider Feedburner… Tags 'spasms, 19yearold, After, american, Back, Beat, Because, Canadian, Final, Games', Retired, Rogers, Serena, Veteran, Williams