Britain's Emma Raducanu overcame a disrupted build-up to earn a gutsy first-round win at Indian Wells, despite deciding only 20 minutes before the start to play.
Amid illness and a recurring wrist injury, Raducanu, 20, won 6-2 6-3 against Montenegro's Danka Kovinic.
The 2021 US Open champion, ranked 77th, faces Poland's Magda Linette next at the prestigious tournament.
"I didn't feel too good this morning," she told BBC Radio 5 Sports Extra.
"I'm just so happy with the way I fought and dealt with the circumstances.
"I just woke up feeling not great to be honest. I felt quite ill so I'm just happy to have played the match and then to win it despite how I felt today.
"Today before the match, I did not warm up. Two minutes before I was called I was sleeping in the treatment room so I'm just proud to have got out there and then won."
In the men's draw, Andy Murray defeated Tomas Etcheverry 6-7 (5-7) 6-1 6-4 to reach the second round while fellow Briton Jack Draper needed just 55 minutes to win his opener, beating Switzerland's Leandro Riedi 6-1 6-1 to set up a meeting with compatriot Dan Evans.
Indian Wells is one of the biggest events outside of the four Grand Slam tournaments.
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