Johanna Konta stunned by Marketa Vondrousova
Johanna Konta's poor 2018 form continued as she was knocked out of Indian Wells by 18-year-old Marketa Vondrousova 7-6, 6-4, while Garbine Muguruza also made an early exit.
Konta, 26, was given a bye in the first round but she struggled early on against her opponent.
She found herself 3-0 down in the first set but fought back well to get to a position where she had four set points.
However, she then cracked as Vondrousova responded and managed to win the tiebreak to take the first set as the Brit struggled with her serve.
Konta had to dig deep in the second set as well as she found herself a game and two break points down. She dug out well to get to 4-2 up, but, following an injury time out for her opponent, she appeared to lose her focus.
The hugely talented Vondrousova took advantage and got to 5-4.
Konta repeatedly had the chance to hold on her own service but she was eventually broken and Vondrousova goes through to the next round with her first top 15 win.
Elsewhere, reigning WImbledon champion Muguruza was sent home by world no.100 Sachia Vickery of the USA.
Muguruza was defeated in three sets, in a match that lasted two hours and 11 minutes, after winning the opening set by 6-2 and going three games clear in the second set, before the American fought back to beat the Spaniard 6-2, 5-7, 1-6.
Vickery crossed her arms in tribute to the blockbuster film Black Panther to mark her victory and said afterwards: "That was definitely Wakanda Forever."