Aryna Sabalenka advanced to the last 32 of the Miami Open days after the death of her former boyfriend Konstantin Koltsov.
Sabalenka claimed an impressive straight-sets win over her good friend Paula Badosa despite the difficult circumstances surrounding her former partner.
Koltsov died at the age of 42 on Monday in what police described as an "apparent suicide" in Miami.
Sabalenka next faces Anhelina Kalinina in the third round after she beat Caroline Wozniacki on Thursday.