World No.1 Iga Swiatek has continued her Indian Wells title defence with a 6-3 6-1 victory over Emma Raducanu to set up a quarter-final against unseeded Romanian Sorana Cirstea.

Swiatek came under pressure early in the opening set but some clean ball-striking helped her hold for a 3-2 lead after two tight service games.

Having wrapped up the first set when Raducanu sent a shot long from the baseline, Swiatek grabbed an early break in the second to heap the pressure on the Briton.

Swiatek, bidding to become only the second female player after Martina Navratilova (1990 and 1991) to successfully defend the Indian Wells title, raced to a 5-1 lead playing flawless tennis and running her opponent ragged.

The reigning US Open champion closed out the win when Raducanu struck the net on serve in a tame end to her fine run in the tournament.

Earlier, Coco Gauff rallied from a break down in the final set to beat Swede Rebecca Peterson 6-3 1-6 6-4 and reach the quarters for the first time.

After taking the first set, the sixth-seeded American began to struggle with her forehand in the second and an opportunistic Peterson applied the pressure by coming in to the net.

After suffering an early break in the decider, Gauff stepped up her defence, fending off three break points at 4-4 and breaking Peterson for a fourth time on match point to book her spot in the last eight.

Gauff, who turned 19 on Monday, was later serenaded with a rendition of Happy Birthday by the crowd.

"Today, it was just a mental thing, staying in the match," Gauff said.

"I wasn't playing my best in some moments and wasn't serving as well as I'd like to, but my mentality kept me in today."

Next up for Gauff is Belarusian second seed Aryna Sabalenka, who survived a second-set scare to beat Barbora Krejcikova 6-3 2-6 6-4.

Sabalenka, the Australian Open champion, sent down 11 aces to secure victory and get revenge on the Czech, who beat her at last month's Dubai Tennis Championships.

Elsewhere, seventh seed Maria Sakkari outlasted big-serving Czech Karolina Pliskova 6-4 5-7 6-3 in two hours, 45 minutes.

Sakkari will next face Czech 15th seed Petra Kvitova for a semi-final spot, after the two-times Wimbledon champion saved four match points en route to a 6-2 3-6 7-6 (11-9) win over third-seeded American Jessica Pegula.

"I play for these emotions," Kvitova said.

"The match was up and down, a disaster at times. I knew Jessica will not miss, but I still had to go for it.

"This might be one of the best matches I played."

Cirstea bagged her first top-five win since 2017 as the 32-year-old battled past fifth seed Caroline Garcia 6-4 4-6 7-5.

Wimbledon champion Elena Rybakina beat Varvara Gracheva 6-3 6-0 and will next take on Karolina Muchova, who overcame Marketa Vondrousova 6-4 6-7 (2-7) 6-4.