MIAMI, March 21 ― Naomi Osaka took another confident step in her comeback from maternity leave by easing past Elisabetta Cocciaretto 6-3 6-4 yesterday to move into the second round of the Miami Open, where another returning mother awaits.

Cocciaretto, ranked 51st in the world, represented a potentially tricky first test for Osaka with the Italian coming into Miami having won the WTA 125 event in Charleston last week.