KEY BISCAYNE, FL - MARCH 26: Samantha Stosur of Australia returns a shot against Shuai Peng of China during Day 7 of the Miami Open at Crandon Park Tennis Center on March 26, 2017 in Key Biscayne, Florida. (Photo by Al Bello/Getty Images)

Australian Sam Stosur has reached the 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.