Kimiko Date-Krumm was the defending champion, but chose to not compete this year.
Misaki Doi defeated Junri Namigata in the final 7–5, 6–2.
Misaki Doi is the defending champion but lost to Tamarine Tanasugarn 5–7, 5–7 in the quarterfinals.
María José Martínez Sánchez was the defending champion, but lost to Ekaterina Makarova in the quarterfinals.
Caroline Wozniacki won the title, defeating Kaia Kanepi in the final, 6–1, 6–0. This was the first title in 13 months for the former World No. 1 and her first of 2012.
Tamarine Tanasugarn was the defending champion, but lost in the semifinals to Stefanie Vögele.
Hsieh Su-wei was the defending champion, but she lost in the quarterfinals to Bethanie Mattek-Sands. Karolína Plíšková defeated Mattek-Sands in the final, 1–6, 7–5, 6–3, to claim her first WTA singles title.
Ashleigh Barty was the defending champion, having won the event in 2012, but decided to participate in the 2013 Aegon Classic that week.
This was a new event on the ITF Women's Circuit. Kurumi Nara won the tournament, defeating Alison Riske in the final, 3–6, 6–3, 6–3.
Julia Glushko was the defending champion of the Fifth Third Bank Tennis Championships, having won the event in 2012, but she lost in the semifinals to Shelby Rogers in 2013. Rogers went on to win the title, defeating Julie Coin in the final, 6–4, 7–6(7–3).
Serena Williams successfully defended her title, beating Li Na in the final, 7–5, 6–1. This was Williams' record seventh Miami title.
Hsieh Su-wei and Peng Shuai were the defending champions, but they chose not to participate this year.
Chuang Chia-jung and Liang Chen won the title, defeating Alizé Cornet and Magda Linette in the final, 2–6, 7–6(7–3), [10–7], despite being a match point down in the second set.
Eugenie Bouchard was the defending champion, but chose not to participate this year.
Ana Ivanovic was the defending champion, but lost in the second round to Michelle Larcher de Brito.
Angelique Kerber won the title, defeating Karolína Plíšková in the final, 6–7(5–7), 6–3, 7–6(7–4).
Serena Williams was the defending champion, but withdrew due to an elbow injury.
Misaki Doi and Elina Svitolina were the defending champions, but Doi decided not to participate.
Svitolina partnered Daria Gavrilova and successfully defended the title, defeating Çağla Büyükakçay and Jelena Janković in the final, 5–7, 6–1, [10–4].
Vitalia Diatchenko was the defending champion, but she chose not to participate.
This was the first edition of the tournament.
Angelique Kerber was the defending champion, but retired in the semifinals against Sloane Stephens.
Angelique Kerber was the reigning champion, but chose to compete in Båstad instead.
Misaki Doi was the defending champion, but lost in the first round to Lauren Davis.
Maria Sharapova was the defending champion, but withdrew due to a shoulder injury.
