2018 Miami Open

The 2018 Miami Open presented by Itaú (also known as 2018 Miami Masters) was a professional men and women's tennis tournament played on outdoor hard courts. It was the 34th edition of the Miami Open, and part of the Masters 1000 category on the 2018 ATP World Tour, and of the Premier Mandatory category on the 2018 WTA Tour. All men and women's events took place at the Tennis Center at Crandon Park in Key Biscayne, Florida, United States, from March 19 through April 1, 2018. It was the last time the tournament was played at the Tennis Center at Crandon Park. The tournament moved to the Hard Rock Stadium starting in 2019.

Point distribution

 * Players with byes receive first round points.

Seeds
The following are the seeded players. Rankings and seedings are based on ATP rankings as of March 19, 2018. † The player did not qualify for the tournament in 2017. Accordingly, points for his 18th best result are deducted instead. ‡ The player used an exemption to skip the tournament in 2017. Accordingly, points for his 18th best result are deducted instead.

Withdrawals
The following players would have been seeded, but they withdrew from the event.

† Ramos Viñolas is entitled to use an exemption to skip the tournament and substitute his 18th best result (45 points) in its stead. Accordingly, his points after the tournament will remain unchanged.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇨🇾 Marcos Baghdatis
 * 🇺🇸 Christopher Eubanks
 * 🇷🇸 Miomir Kecmanović
 * 🇪🇸 Nicola Kuhn
 * 🇸🇪 Mikael Ymer

The following players received entry using a protected ranking:
 * 🇯🇵 Yoshihito Nishioka

The following players received entry from the qualifying draw:
 * Ričardas Berankis
 * 🇮🇳 Yuki Bhambri
 * 🇬🇧 Liam Broady
 * 🇦🇺 Alex de Minaur
 * 🇧🇷 Rogério Dutra Silva
 * 🇺🇸 Bjorn Fratangelo
 * 🇫🇷 Calvin Hemery
 * Darian King
 * 🇦🇺 Thanasi Kokkinakis
 * 🇦🇺 John Millman
 * 🇺🇸 Michael Mmoh
 * 🇬🇧 Cameron Norrie

The following player received entry as lucky loser:
 * 🇧🇦 Mirza Bašić

Withdrawals

 * Before the tournament
 * 🇫🇷 Julien Benneteau → replaced by Ivo Karlović
 * Pablo Cuevas → replaced by 🇺🇸 Frances Tiafoe
 * 🇦🇷 Federico Delbonis → replaced by 🇧🇦 Mirza Bašić
 * 🇺🇦 Alexandr Dolgopolov → replaced by 🇲🇩 Radu Albot
 * 🇩🇪 Philipp Kohlschreiber → replaced by 🇸🇰 Lukáš Lacko
 * 🇮🇹 Paolo Lorenzi → replaced by 🇫🇷 Jérémy Chardy
 * 🇩🇪 Florian Mayer → replaced by 🇨🇦 Vasek Pospisil
 * 🇫🇷 Gaël Monfils → replaced by Nicolás Jarry
 * 🇬🇧 Andy Murray (hip surgery) → replaced by 🇮🇹 Thomas Fabbiano
 * 🇪🇸 Rafael Nadal (psoas muscle injury) → replaced by 🇩🇪 Maximilian Marterer
 * 🇫🇷 Lucas Pouille → replaced by 🇩🇴 Víctor Estrella Burgos
 * 🇪🇸 Albert Ramos Viñolas → replaced by 🇷🇺 Mikhail Youzhny
 * 🇮🇹 Andreas Seppi → replaced by 🇦🇷 Nicolás Kicker
 * 🇦🇹 Dominic Thiem (ankle injury) → replaced by 🇷🇴 Marius Copil
 * 🇫🇷 Jo-Wilfried Tsonga → replaced by 🇷🇸 Dušan Lajović
 * Stan Wawrinka → replaced by 🇺🇸 Taylor Fritz

Seeds

 * 1 Rankings as of March 19, 2018.

Other entrants
The following pairs received wildcards into the doubles main draw:
 * 🇧🇷 Marcelo Demoliner / 🇨🇦 Daniel Nestor
 * 🇦🇺 Nick Kyrgios / 🇦🇺 Matt Reid

Seeds
The following are the seeded players. Seedings are based on WTA rankings as of March 5, 2018. Rankings and points before are as of March 19, 2018.

† The player did not qualify for the tournament in 2017. Accordingly, points for her 16th best result are deducted instead.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇺🇸 Amanda Anisimova
 * 🇧🇾 Victoria Azarenka
 * 🇺🇸 Claire Liu
 * 🇺🇸 Bethanie Mattek-Sands
 * 🇺🇸 Whitney Osuigwe
 * 🇺🇸 Bernarda Pera
 * 🇦🇺 Ajla Tomljanović
 * 🇺🇸 Serena Williams

The following players received entry from the qualifying draw:
 * 🇬🇧 Katie Boulter
 * 🇺🇸 Danielle Collins
 * Viktorija Golubic
 * Polona Hercog
 * 🇺🇸 Sofia Kenin
 * Monica Niculescu
 * 🇸🇪 Rebecca Peterson
 * 🇩🇪 Andrea Petkovic
 * 🇺🇸 Alison Riske
 * 🇷🇺 Natalia Vikhlyantseva
 * Stefanie Vögele
 * 🇨🇳 Wang Yafan

The following player received entry as a lucky loser:
 * 🇫🇷 Océane Dodin

Withdrawals
During the tournament
 * Before the tournament
 * Belinda Bencic → replaced by 🇫🇷 Océane Dodin
 * 🇸🇰 Dominika Cibulková → replaced by 🇪🇸 Lara Arruabarrena
 * 🇷🇺 Margarita Gasparyan → replaced by 🇺🇸 Madison Brengle
 * 🇺🇦 Kateryna Kozlova → replaced by Verónica Cepede Royg
 * Ana Konjuh → replaced by 🇺🇦 Kateryna Bondarenko
 * Mirjana Lučić-Baroni → replaced by 🇰🇿 Yulia Putintseva
 * 🇨🇳 Peng Shuai → replaced by 🇧🇪 Alison Van Uytvanck
 * 🇨🇿 Lucie Šafářová → replaced by 🇸🇪 Johanna Larsson
 * 🇷🇺 Maria Sharapova → replaced by 🇺🇸 Jennifer Brady
 * 🇩🇪 Laura Siegemund → replaced by 🇨🇿 Kristýna Plíšková
 * 🇺🇸 Amanda Anisimova

Retirements

 * 🇰🇿 Zarina Diyas
 * 🇪🇪 Kaia Kanepi
 * 🇺🇸 Madison Keys
 * Monica Niculescu

Seeds

 * 1 Rankings as of March 5, 2018.

Other entrants
The following pairs received wildcards into the doubles main draw:
 * 🇧🇾 Victoria Azarenka / 🇧🇾 Aryna Sabalenka
 * 🇨🇦 Eugenie Bouchard / 🇺🇸 Sloane Stephens
 * 🇬🇧 Johanna Konta / 🇬🇧 Heather Watson

The following pair received entry as alternates:
 * 🇩🇪 Tatjana Maria / 🇺🇦 Lesia Tsurenko

Withdrawals

 * Before the tournament
 * 🇦🇺 Daria Gavrilova / 🇦🇺 Samantha Stosur

Men's singles

 * 🇺🇸 John Isner def. 🇩🇪 Alexander Zverev, 6–7(4–7), 6–4, 6–4

Women's singles

 * 🇺🇸 Sloane Stephens def. Jeļena Ostapenko, 7–6(7–5), 6–1

Men's doubles

 * 🇺🇸 Bob Bryan / 🇺🇸 Mike Bryan def. 🇷🇺 Karen Khachanov / 🇷🇺 Andrey Rublev, 4–6, 7–6(7–5), [10–4]

Women's doubles

 * 🇦🇺 Ashleigh Barty / 🇺🇸 CoCo Vandeweghe def. 🇨🇿 Barbora Krejčíková / 🇨🇿 Kateřina Siniaková, 6–2, 6–1