Unseeded Naomi Osaka claimed her first WTA title with an emphatic victory over Daria Kasatkina at the BNP Paribas Open in Indian Wells.
The Japanese world number 44 beat the Russian 20th seed 6-3 6-2 in one hour 10 minutes.
Osaka, who dropped just one set throughout the tournament, dominated on serve to outmuscle Kasatkina.
The 20-year-old is the youngest champion at Indian Wells since Ana Ivanovic in 2008.
It was the first time two players aged under 21 had contested the final at Indian Wells since Serena Williams, then aged 20, beat 18-year-old Kim Clijsters in 2001.