2013 New Haven Open at Yale – Singles

Petra Kvitová was the defending champion, but she was defeated in the final by Simona Halep 6–2, 6–2.

Seeds
The top two seeds receive a bye into the second round. • # 🇮🇹 Sara Errani (second round)

• # 🇩🇪 Angelique Kerber (second round)

• # 🇨🇿 Petra Kvitová (final)

• # Caroline Wozniacki (semifinals)

• # 🇮🇹 Roberta Vinci (first round)

• # 🇺🇸 Sloane Stephens (quarterfinals)

• # 🇩🇪 Sabine Lisicki (second round)

• # 🇸🇰 Dominika Cibulková (first round)

Seeds
• # Hsieh Su-wei (moved to main draw)

• # 🇷🇴 Monica Niculescu (first round)

• # 🇺🇦 Elina Svitolina (qualifying competition, lucky loser)

• # 🇩🇪 Annika Beck (qualifying competition, lucky loser)

• # Stefanie Vögele (qualified)

• # Monica Puig (qualified)

• # 🇯🇵 Ayumi Morita (qualified)

• # 🇪🇸 Lourdes Domínguez Lino (first round)

• # 🇧🇪 Yanina Wickmayer (qualifying competition)

• # 🇮🇹 Karin Knapp (qualified)

• # 🇧🇬 Tsvetana Pironkova (second round)

• # 🇸🇪 Johanna Larsson (first round)

• # 🇪🇸 Sílvia Soler Espinosa (first round)

Qualifiers
• # 🇺🇸 Alison Riske

• # 🇯🇵 Ayumi Morita

• # 🇸🇰 Anna Karolína Schmiedlová

• # 🇮🇹 Karin Knapp

• # Stefanie Vögele

• # Monica Puig

Lucky losers
• # 🇺🇦 Elina Svitolina

• # 🇩🇪 Annika Beck