Upsets have dominated the fourth round of the WTA Tour event in Indian Wells, with two top-five seeds being dispatched in straight sets.
Second-seeded Iga Swiatek lost to 24th-seeded Jelena Ostapenko 6-4 6-3 – a day after top seed Karolina Pliskova was stunned by unheralded Beatriz Haddad Maia of Brazil.
Swiatek’s defeat was then followed up by American Jessica Pegula routing fifth-seeded Elina Svitolina 6-1 6-1.
US Open runner-up Leylah Fernandez, the 23rd seed, then went out to Shelby Rogers 2-6 6-1 7-6 (7-4).
Rogers knocked out world No.1 Ash Barty in the third round at Flushing Meadows last month before falling to eventual champion Emma Raducanu in the fourth round.
In the day’s opening match, former French Open champion Ostapenko came from a break down in each set to secure to overcome Swiatek – to be 2-0 in her career meetings with the Polish grand slam winner – and advance to the quarter-finals.
The Latvian will face Rogers next after the American overwhelmed teenage ace Fernandez with 36 winners to 25.
Pegula needed just 68 minutes against an out-of-sorts Svitolina to book a spot in her seventh quarter-final of the season and fourth at WTA 1000 level.