Sloane Stephens defeated Jeļena Ostapenko in the final, 7–6(7–5), 6–1 to win the women's singles tennis title at the 2018 Miami Open. It was her sixth career singles title, first Premier Mandatory title, and first title since winning the US Open in September 2017. By virtue of her victory, Stephens made her debut in the top 10, at No. 9.
Johanna Konta was the defending champion, but lost in the fourth round to Venus Williams.
Danielle Collins became the first qualifier in Miami Open history to reach the semifinals.
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 loser
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