Australian Sam Stosur has reached theย fourth round of a WTA event for the first time this year, after defeating Shuai Peng in a tough three set match at the Miami Open.
Stosur fought back from a set down to win 4-6, 6-3, 7-5 over the world No.43 in two and a half hours.
The 2011 US Open champion will now face world No.5 Simona Halep in the quarter finals.
