Back injury forces Wawrinka out of Federer clash in Basel

Stan Wawrinka was forced to withdraw from Friday's Basel quarter-final showdown against best friend Roger Federer with a back injury, just an hour after struggling past America's Frances Tiafoe in a gruelling second round clash.

from Sports News: Latest Cricket News, Live Match Scores & Sports News Headlines, Results & more https://ift.tt/363jdrV