Ashleigh Barty defeated Karolína Plíšková in the final, 7–6(7–1), 6–3 to win the women's singles tennis title at the 2019 Miami Open. It was Barty's first WTA Premier Mandatory title. She entered the top 10 in the WTA rankings for the first time with the win.
Sloane Stephens was the defending champion, but lost in the third round to Tatjana Maria.
Naomi Osaka retained the WTA No. 1 singles ranking after Simona Halep lost in the semifinals. Petra Kvitová, Angelique Kerber, and Elina Svitolina were also in contention for the top ranking.
Seeds All seeds received a bye into the second round.
Draw
Finals
Top half
Section 1
Section 2
Section 3
Section 4
Bottom half
Section 5
Section 6
Section 7
Section 8
Qualifying
Seeds
Qualifiers
Lucky losers
Qualifying draw
First qualifier
Second qualifier
Third qualifier
Fourth qualifier
Fifth qualifier
Sixth qualifier
Seventh qualifier
Eighth qualifier
Ninth qualifier
Tenth qualifier
Eleventh qualifier
Twelfth qualifier
References
External links Main draw Qualifying draw