Singles
Seeds
- Belgium Alison Van Uytvanck (Withdrew)
- Chinese Taipei Hsieh Su-wei (Quarterfinals)
- United States Madison Brengle (Semifinals)
- Russia Vera Zvonareva (Semifinals)
- United States Lauren Davis (First round)
- United States Christina McHale (First round)
- Belgium Greet Minnen (Second round)
- Mexico Renata Zarazúa (Final)
- Australia Storm Sanders (Second round)
Poland Magdalena Fręch def. Mexico Renata Zarazúa 6–3, 7–6(7–4)
Doubles
Seeds
- Chinese Taipei Hsieh Su-wei / Chinese Taipei Hsieh Yu-chieh (Quarterfinals)
- India Ankita Raina / United Kingdom Eden Silva (Silva withdrew due to illness; Raina re-paired with Mona Barthel)
- Ukraine Kateryna Bondarenko / Germany Tatjana Maria (Quarterfinals)
- United States Quinn Gleason / United States Jamie Loeb (First round)
Thailand Peangtarn Plipuech / Indonesia Jessy Rompies def. United States Usue Maitane Arconada / Spain Cristina Bucșa 3–6, 7–6(7–5), [10–8]
2019 Thoreau Tennis Open Draw
Champions
Singles
United States Caroline Dolehide def. United States Ann Li, 6–3, 7–5
Doubles
United States Angela Kulikov / United States Rianna Valdes def. United States Elizabeth Halbauer / United States Ingrid Neel, 7–6(7–3), 4–6, [17–15]