Iga Swiatek's hopes of landing another 'Sunshine Double' ended in a 6-4 6-2 fourth round loss to Ekaterina Alexandrova on Monday as the world number one joined third seed Coco Gauff in making an early exit from the Miami Open.
Swiatek, who won the first leg of the Sunshine Double at Indian Wells earlier this month, was completely outplayed by the Russian world number 16, who claimed the biggest win of her career.
The top seed, who captured the Sunshine Double in 2022, never broke Alexandrova's serve and had no answer to her powerful and precise groundstrokes under the lights in South Florida.
Alexandrova, seeded 14th, will next face fifth seed Jessica Pegula in the quarter-finals after she overcame fellow American Emma Navarro 7-6(1) 6-3.
Frenchwoman Caroline Garcia's serve was clicking early in her battle against Gauff and she never faced a break point in the opening set before the American raised her level to even the affair at a set apiece.
In the first game of the deciding set, Garcia fended off four break points to hold serve and broke at love to take a 2-0 lead she would not relinquish against her20-year-old opponent.
Next up for Garcia is American Danielle Collins, who beat Sorana Cirstea 6-3 6-2.
Fourth seed Elena Rybakina powered past Madison Keys 6-3 7-5 to dispatch Florida resident Keys and will next meet a well-rested Maria Sakkari after the Greek eighth seed got a walkover into the quarter-finals.
Rybakina was more efficient than Keys, winning just over 80% of her first serve points and converting three of her eight break points during the 84-minute encounter.
Sakkari was scheduled to play in the day's opening match on the Grandstand court but advanced without hitting a ball as Russia's Anna Kalinskaya withdrew ahead of their fourth-round match due to health issues.