Briton Heather Watson took only 47 minutes to book her spot in the Miami Open second round with a 6-1 6-0 win over Petra Cetkovska.
The 23-year-old world number 69 will now play 20th seed Sloane Stephens of the United States.
In the men's event, British number three Kyle Edmund will face world number one Novak Djokovic after beating Czech Jiri Vesely 6-4 5-7 7-6 (8-6).
Watson won her third WTA Tour title in Monterrey earlier this month.
"I'm very happy with today," she told BBC Sport. "I don't think my opponent was at her best.