MIAMI, March 21 — World number one Carlos Alcaraz was dialed-in on Friday, powering past rising Brazilian talent Joao Fonseca 6-4, 6-4 to reach the third round of the Miami Open.

The 22-year-old Spaniard used an early break in each set and saved all three break points he faced in a confident performance at Hard Rock Stadium, where 19-year-old Fonseca was cheered by a raucous contingent of fans.