British No 1 Jo Konta struggled to find her form in a straight-sets defeat in the third round of the Miami Open on Saturday night. 

The 29-year-old, who claimed the biggest title of her career when she won in Miami in 2017, was overwhelmed by two-time Wimbledon champion Petra Kvitova. 

The Czech ninth seed won 6-1, 6-2 in just 58 minutes to progress to the fourth round, where she takes on fifth seed Elina Svitolina.

Ukrainian Svitolina beat Ekaterina Alexandrova 7-6(1), 6-4 in the third round, while Victoria Azarenka will play world number one Ash Barty for a place in the quarters. 

Former world No 1 Azarenka beat Angelique Kerber 7-5, 6-2, while Barty defeated Jelena Ostapenko, in a battle of the French Open winners, 6-3, 6-2. 

Third seed and 2019 Wimbledon winner Simona Halep withdrew from her match against Anastasija Sevastova due to a shoulder injury.  

Meanwhile, in the men's singles, Brit Cameron Norrie takes on Taylor Fritz on Sunday for a place in the fourth round after his impressive round two win against Grigor Dimitrov on Friday.