Rafael Nadal reaches semifinals in Miami , beating 2010 runner-up Tomas Berdych . World No . 1 will face his old rival Roger Federer in last four for first time since 2005 . Comment: Maria Sharapova will face 2009 champion Victoria Azarenka in women 's final .
Rafael Nadal reaches semifinals in Miami , beating 2010 runner-up Tomas Berdych . World No . 1 will face his old rival Roger Federer in last four for first time since 2005 . Two-time Miami winner Federer has easy progress as Gilles Simon retires injured . Maria Sharapova will face 2009 champion Victoria Azarenka in women 's final .