Naomi Osaka stumbled badly in her first match since winning the Australian Open as the world number one went down in a flurry of errors to exit the Dubai Championships on Tuesday.
Dubai-based Frenchwoman Kristina Mladenovic claimed a 6-3, 6-3 victory to reach the third round as Osaka made 25 unforced errors.
The rout, which featured seven breaks of the Osaka serve, took barely an hour, sending Mladenovic into a Wednesday contest with Carla Suarez Navarro.
“This is my home tournament, I live here,” world number 67 Mladenovic said. “It’s great to get a win like this in front of a big crowd. “Beating the number one is always special.”
The second set was riddled with seven consecutive breaks of serve before Mladenovic finished off the job with a winner to the empty court on match point.