World number one Simona Halep was knocked out of the Miami Open on Saturday by 32nd seed Agnieszka Radwanska.
Halep was stunned as her Polish opponent fought back to win 6-3, 2-6, 3-6 in one hour and 44 minutes.
The defeat means both top seeds are out of the tournament after second seed Caroline Wozniacki was ousted by Monica Puig a day earlier.
— WTA (@WTA) March 24, 2018
Radwanska, the 2012 Champion, will now face Victoria Azarenka in the last 32 after she defeated Latvia’s Anastasija Sevastova 3-6, 6-4, 6-1.
Azarenka is unseeded as she attempts to get her career back on track after a prolonged absence following the birth of her son and a protracted custody battle with the father.
— WTA (@WTA) March 25, 2018
Also into the last 16 was Angelique Kerber after the German defeated Anastasia Pavlyuchenkova of Russia 6-4, 6-4.
US Open champion Sloane Stephens was made to work for her passage into the next round against Romania’s Monica Niculescu.
Stephens dropped the first set in a tie break, but advanced when her opponent retired in the third set with the American leading 6-7(1-7), 6-3, 4-0.
Third seed Garbine Muguruza enjoyed a comfortable win over Christina McHale, the highest remaining seed dropping just three games on her way to a 6-2, 6-1 victory.