World No 1 has not been beaten since this season with 17-0 record . Serena Williams plays Carla Suarez Navarro in the Miami Open final . Players including Simona Halep , Maria Sharapova and Eugenie Bouchard have failed to mount a serious challenge to the American veteran .
World No 1 has not been beaten since the start of the year with 17-0 record . Serena Williams plays Carla Suarez Navarro in the Miami Open final . Players including Simona Halep , Maria Sharapova and Eugenie Bouchard have failed to mount a serious challenge to the American veteran .