Halep will next face Venus Williams, who had an easier time in defeating Daria Kasatkina.
Osaka, ranked No. 1 in the world, fell to Hsieh Su-wei of Taiwan in three in the third round. Williams cited a knee injury.
Mari Osaka, ranked 338th, is the big sister of Naomi, and she got a wild-card entry, playing her first WTA main draw match on Thursday.
The moved and improved Miami Open, a top men’s and women’s tennis tournament, begins this week at Hard Rock Stadium, home of the Miami Dolphins.
The 18-year-old Canadian ranked 60th is the youngest player to win the tournament since 17-year-old Serena Williams in 1999.
Nadal also said he would not play again until the Monte-Carlo Masters clay event in mid-April.
The 18-year-old surprise finalist at Indian Wells is part of a new wave of gifted Canadian teenagers with immigrant families and potential Grand Slam titles
With straight-set wins on Friday, Roger Federer and Rafael Nadal set up a meeting in a BNP Paribas Open semifinal on Saturday. But Nadal’s right
Maria Patrascu, never ranked higher than 600th, has emerged as the spokeswoman for those angry about rules designed to slash the number of pro tennis
After being sidetracked by injury, Bencic, 22, has become one of the more feared players in tennis lately. She beat Karolina Pliskova on Thursday for