Yuki fights past Mahut to progress

India's Yuki Bhambri fought his way to a straight sets win over experienced Frenchman Nicolas Mahut in the men's singles first round match at the BNP Paribas Open here.

Yuki, ranked 110, defeated World No 101 Mahut 7-5, 6-3 in one hour and 41 minutes. It was their first meeting on the ATP tour and both had qualified for the main draw.

The Indian next faces another Frenchman Lucas Pouille, who got a first round bye. Pouille reached a career-high rank of 12 earlier this month.

World number one Simona Halep and fifth seed Karolina Pliskova eased through their WTA Indian Wells openers on Friday but reigning Wimbledon champ Garbine Muguruza bit the dust in the California desert.

Halep beat Karolina's sister Kristyna Pliskova 6-4, 6-4 while Karolina eased past Irina-Camelia Begu 7-6 (7/4), 6-1 to reach the third round of the combined WTA/ATP hardcourt tournament.

Muguruza became the first major casualty of the event, suffering a shock 2-6, 7-5, 6-1 defeat to world number 100 Sachia Vickery.

This the Spaniard's first loss to a player ranked in the 100s since she was beaten by Jana Cepelova (124) at Wimbledon in 2016.

Muguruza had five double faults and had her serve broken five times in the two hours and 11 minutes night match.

Crowd favourite Vickery posted her first career win over a top 10 player as she served masterfully and controlled the rallies with her ground strokes.

Vickery said the partisan crowd motivated her.

"The atmosphere really helped me even though I was feeling it a bit tired physically. I kept telling myself 'just do your best'," said the 22-year-old.

Halep roared into the third round by overpowering Kristyna in straight sets.

The 26-year-old Romanian will meet US wildcard Caroline Dolehide who beat Dominika Cibulkova of Slovakia 5-7, 6-3, 6-4.

Halep and Denmark's Caroline Wozniacki have been taking turns at No 1 this year.

Wozniacki will play her first match of the tournament against qualifier Lara Arruabarrena.

Elsewhere, ninth seeded Petra Kvitova won her 14th straight match to equal the longest winning streak of her career by outlasting Yulia Putintseva 6-7 (4/7), 7-6 (7/3), 6-4.

Rising star Jelena Ostapenko battled her way into the third round by outlasting Swiss Belinda Bencic 6-4, 3-6, 6-1.

The 20-year-old will next face Petra Martic of Croatia who beat Czech 26th seed Barbora Strycova 7-5, 6-4.

In the men's section, teenage qualifier Felix Auger-Aliassime scored a superb 6-2 7-6(4) first-round victory over fellow Canadian Vasek Pospisil.

Unseeded Gael Monfils rolled to an easy 6-3, 6-3 victory over Aussie Matthew Ebden

Kyrgios pulls out

Australia's Nick Kyrgios pulled out of the tournament on Friday with a elbow injury.

Kyrgios, who was seeded 17th, withdrew ahead of his opening second round match against Russian Danil Medvedev.

Kyrgios was replaced in the draw by lucky loser Matteo Berrettini.