2019 Libéma Open – Women's singles

Alison Riske defeated Kiki Bertens in the final, 0–6, 7–6(7–3), 7–5, to win the women's singles title at the 2019 Rosmalen Grass Court Championships. Riske saved five championship points en route to winning her second career WTA Tour singles title, her first in five years.

Aleksandra Krunić was the defending champion, but she lost to Kirsten Flipkens in the first round in a rematch of the previous year's final.

Seeds
• # Kiki Bertens (final)

• #🇧🇾 Aryna Sabalenka (first round)

• #🇧🇪 Elise Mertens (first round)

• #🇺🇦 Lesia Tsurenko (second round)

• # Petra Martić (withdrew)

• #🇨🇳 Zheng Saisai (withdrew)

• #🇸🇰 Viktória Kužmová (first round)

• #🇺🇸 Amanda Anisimova (withdrew)

• #🇧🇪 Alison Van Uytvanck (second round)

Seeds
• # 🇫🇷 Fiona Ferro (qualifying competition, lucky loser)

• # 🇺🇸 Christina McHale (qualifying competition, lucky loser)

• # 🇧🇪 Ysaline Bonaventure (qualified)

• # 🇪🇸 Paula Badosa (qualified)

• # 🇺🇸 Varvara Lepchenko (qualified)

• # 🇦🇺 Priscilla Hon (qualified)

• # 🇰🇿 Elena Rybakina (qualified)

• # 🇩🇪 Tamara Korpatsch (first round)

• # 🇷🇺 Anna Kalinskaya (qualifying competition, lucky loser)

• # 🇩🇪 Antonia Lottner (qualifying competition)

• # 🇧🇪 Greet Minnen (qualified)

• # 🇪🇸 Georgina García Pérez (first round, retired)

Qualifiers
• # 🇧🇪 Greet Minnen

• # 🇰🇿 Elena Rybakina

• # 🇧🇪 Ysaline Bonaventure

• # 🇪🇸 Paula Badosa

• # 🇺🇸 Varvara Lepchenko

• # 🇦🇺 Priscilla Hon

Lucky losers
• # 🇫🇷 Fiona Ferro

• # 🇺🇸 Christina McHale

• # 🇷🇺 Anna Kalinskaya