Two-time major winner Simona Halep secured a spot in the Indian Wells Open last 16 with a strong 6-3 6-4 victory over 16th seed Cori Gauff on Sunday.

Halep, who is aiming to rebuild her ranking in 2022 after an injury-hit second half of last year, was excellent with her return, particularly on Gauff's second serve to gain the edge.

The Romanian saved all four break points generated by Gauff, while she converted three of the nine break points that she created.

Halep, who started the year with victory at the Melbourne Summer Set 1 before a last-16 loss to Alize Cornet at the Australian Open, needed only one hour and 16 minutes to seal her progress.

She will next play Romanian compatriot Sorana Cirstea after the 26th seed won 5-7 6-1 6-0 against lucky loser Anna Kalinskaya.

Last year's US Open champion and British 11th seed Emma Raducanu was bundled out by Croatian world number 79 Petra Martic 6-7 (3-7) 6-4 7-5.

Raducanu had served for the match in the final set but the Croatian won the final three games. Martic triumphed in two hours and 46 minutes, reaching the last 16 at Indian Wells for the second time in her career.

Martic will face 28th seed Liudmila Samsonova who triumphed 6-4 7-6 (7-4) over Danka Kovinic.

Third seed Iga Swiatek came from a set down to win 6-7 (3-7) 6-2 6-1 over Clara Tauson in two hours and 18 minutes.

Swiatek has won seven straight matches and is unbeaten at WTA 1000 events this season, having triumphed in Doha last month.

The Pole will take on three-time major winner Angelique Kerber in the last 16 after the German won comfortably over Daria Kasatkina 6-2 6-1.

American 25th seed Madison Keys got past countrywoman Alison Riske 7-6 (7-4) 6-1, setting up a fourth-round meeting with British qualifier Harriet Dart who beat Kaia Kanepi in straight sets.