World No.1 Iga Swiatek has got her Indian Wells WTA 1000 title defence off to a dominant start with a 6-0 6-1 thrashing of American Claire Liu.

The top seed won the first 11 games of the second-round clash before claiming victory in just over an hour on Saturday, the fifth time this season she's dropped just one game in winning a match.

Beaten in the fourth round at the Australian Open in January, Swiatek improved to 13-3 in 2023 with the win. All 13 of those wins have come in straight sets.

"Tactically and tennis-wise, everything was on point, so I'm pretty happy with my game," said Swiatek, who next faces either American wildcard Peyton Stearns or 2019 US Open champion Bianca Andreescu of Canada.

Emma Raducanu knocked out 20th seed Magda Linette 7-6 (7-3) 6-2 to reach the third round of Indian Wells and notch her biggest win since triumphing at the US Open in 2021.

The 20-year-old Briton fell into a 4-1 first set hole but rallied from there, dictating points with her forehand to push Linette deep into the court.

She sealed the win by whipping a forehand winner down the line to bring the fans to their feet on a warm and windy day in the Southern California desert.

The win marked Raducanu's first back-to-back victories since September and is a hopeful sign that she may be moving beyond the multiple health issues that have beset her of late.

She suffered an ankle injury in the lead up to January's Australian Open, tonsillitis that forced her to withdraw ahead of last week's Austin Open and a flaring up of the wrist injury, which had cut short her 2022 season and required attention from a physiotherapist on Saturday.

"I'd say I feel more positive about my game today," Raducanu told reporters.

"The first day I didn't really know what was going on. Today I felt pretty decent out there, especially with the conditions. It was really windy and I did well to overcome it."

She will next face either Czech Katerina Siniakova or Brazil's Beatriz Haddad Maia.

Elsewhere, Czech Karolina Muchova scored an impressive 7-6 (7-1) 6-3 win in her tournament debut over two-time champion Victoria Azarenka of Belarus and Czech Marketa Vondrousova crushed her compatriot, the 28th-seeded Marie Bouzkova, 6-1 6-1.