| Singles | |
|---|---|
| 2018 Dow Tennis Classic | |
| Champion |  Madison Brengle |
| Runner-up | Jamie Loeb |
| Final score | 6–1, 6–2 |
Tatjana Maria was the defending champion, but chose to compete at the 2018 St. Petersburg Ladies' Trophy instead.
Madison Brengle won the title, defeating Jamie Loeb in the final 6–1, 6–2.
Mihaela Buzărnescu (semifinals) Jennifer Brady (semifinals) Madison Brengle (champion) Sofia Kenin (second round) Sachia Vickery (second round, retired)
Richèl Hogenkamp (first round)
Mariana Duque Mariño (first round)
Evgeniya Rodina (quarterfinals)| Semifinals | Final | ||||||||||||
| 1 | Mihaela Buzărnescu | 4 | 1 | ||||||||||
| 3/WC | Madison Brengle | 6 | 6 | ||||||||||
| 3/WC | Madison Brengle | 6 | 6 | ||||||||||
| Jamie Loeb | 1 | 2 | |||||||||||
| Jamie Loeb | 7 | 4 | 6 | ||||||||||
| 2 | Jennifer Brady | 5 | 6 | 4 | |||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | M Buzărnescu | 7 | 7 | ||||||||||||||||||||||||
 N Broady | 5 | 5 | 1 | M Buzărnescu | 1 | 6 | 6 | ||||||||||||||||||||
 S Vögele | 6 | 6 | S Vögele | 6 | 0 | 2 | |||||||||||||||||||||
 AK Schmiedlová | 4 | 3 | 1 | M Buzărnescu | 77 | 4 | 6 | ||||||||||||||||||||
| Q |  U Eikeri | 1 | 3 |  R Peterson | 65 | 6 | 3 | ||||||||||||||||||||
| R Peterson | 6 | 6 | R Peterson | 7 | 6 | ||||||||||||||||||||||
| WC | J Pegula | 6 | 6 | WC | J Pegula | 5 | 4 | ||||||||||||||||||||
| 7 | M Duque Mariño | 2 | 1 | 1 | M Buzărnescu | 4 | 1 | ||||||||||||||||||||
| 3/WC | M Brengle | 6 | 6 | 3/WC | M Brengle | 6 | 6 | ||||||||||||||||||||
| J Teichmann | 1 | 1 | 3/WC | M Brengle | 6 | 6 | |||||||||||||||||||||
| J Boserup | 67 | 6 | 6 | J Boserup | 2 | 2 | |||||||||||||||||||||
| Q |  J Jakšić | 79 | 2 | 3 | 3/WC | M Brengle | 6 | 6 | |||||||||||||||||||
| L Kerkhove | 1 | 0 | 8 | E Rodina | 1 | 1 | |||||||||||||||||||||
| Q |  K Sebov | 6 | 6 | Q | K Sebov | 3 | 5 | ||||||||||||||||||||
| WC | V Duval | 3 | 2 | 8 | E Rodina | 6 | 7 | ||||||||||||||||||||
| 8 | E Rodina | 6 | 6 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 6 | R Hogenkamp | 0 | 1 | ||||||||||||||||||||||||
| C Zhao | 6 | 6 | C Zhao | 6 | 6 | ||||||||||||||||||||||
| I Bara | 77 | 77 | I Bara | 2 | 1 | ||||||||||||||||||||||
| LL | UM Arconada | 65 | 64 | C Zhao | 2 | 0 | |||||||||||||||||||||
 M Bouzková | 4 | 7 | 3 | J Loeb | 6 | 6 | |||||||||||||||||||||
| J Loeb | 6 | 5 | 6 | J Loeb | 6 | 6 | |||||||||||||||||||||
| WC | W Osuigwe | 2 | 3 | 4 | S Kenin | 3 | 2 | ||||||||||||||||||||
| 4 | S Kenin | 6 | 6 | J Loeb | 7 | 4 | 6 | ||||||||||||||||||||
| 5 | S Vickery | 77 | 6 | 2 | J Brady | 5 | 6 | 4 | |||||||||||||||||||
| Q | A Li | 64 | 1 | 5 | S Vickery | 1 | 0r | ||||||||||||||||||||
| B Andreescu | 6 | 6 | B Andreescu | 6 | 1 | ||||||||||||||||||||||
 M Doi | 2 | 4 | B Andreescu | 4 | 5 | ||||||||||||||||||||||
| F Abanda | 6 | 6 | 2 | J Brady | 6 | 7 | |||||||||||||||||||||
| D Collins | 2 | 2 | F Abanda | 4 | 2 | ||||||||||||||||||||||
 S-j Jang | 62 | 6 | 2 | 2 | J Brady | 6 | 6 | ||||||||||||||||||||
| 2 | J Brady | 77 | 4 | 6 | |||||||||||||||||||||||
Anastasia Pavlyuchenkova was the defending champion and successfully defended her title, defeating Madison Brengle in the final, 7–6(8–6), 7–6(7–3).
France's Alizé Cornet won the title, defeating Mariana Duque Marino in the final, 4-6, 6–1, 6–0.
Serena Williams was the defending champion, but withdrew due to injury.
Nadia Petrova won the first edition of this tournament, defeating Shahar Pe'er 7–5, 6–2 in the final.
Kirsten Flipkens was the defending champion, but lost in the first round to Polona Hercog.
Shelby Rogers was the defending champion, but decided not to participate.
Melanie Oudin was the defending champion, having won the event in 2013, but lost in the second round to Jennifer Brady.
Garbiñe Muguruza was the defending champion heading into the tournament but chose to compete at the Sydney tennis event instead of Hobart. In the final, it was unseeded Brit Heather Watson who defeated the American qualifier in Madison Brengle, 6–3, 6–4 to record her second WTA title.
Anna Schmiedlová was the defending champion, but chose not to participate.
Samantha Stosur was the defending champion, but chose not to participate.
Heather Watson was the defending champion, but lost in the quarterfinals to Johanna Larsson.
Angelique Kerber was the defending champion and successfully defended her title, defeating Laura Siegemund in the final, 6–4, 6–0.
Carla Suárez Navarro was the defending champion, but withdrew before the tournament due to a right shoulder injury.
Taylor Townsend was the defending champion, but chose not to participate.
Caroline Garcia was the defending champion, but lost in the semifinals to Daria Gavrilova.
Caroline Wozniacki was the defending champion and successfully defended her title, defeating Anastasia Pavlyuchenkova in the final, 6–0, 7–5. This marked Wozniacki's first title of 2017 and snapped a six-match losing streak in tournament finals.
Madison Brengle was the defending champion but lost in the second round to Mari Osaka.
Sofia Kenin was the defending champion, but chose not to participate.
Catherine Bellis was the defending champion but chose not to participate.
Shelby Rogers was the defending champion, but chose not to participate.