2021 Transylvania Open – Singles

This was the first edition of the tournament.

Anett Kontaveit won the title, defeating Simona Halep in the final, 6–2, 6–3. Kontaveit won the title without dropping a set. By winning the title, Kontaveit qualified for the WTA Finals, overtaking Ons Jabeur in the Race to Guadalajara, and also entered the top 10 of the WTA rankings for the first time. Her win over Halep in the final also marked her first victory over the former world No. 1.

Halep reached the final losing just 12 games. Her loss snapped a 14 match win streak on home soil.

Seeds
• # 🇷🇴 Simona Halep (final)

• # 🇪🇪 Anett Kontaveit (champion)

• # 🇬🇧 Emma Raducanu (quarterfinals)

• # Jil Teichmann (first round)

• # 🇦🇺 Ajla Tomljanović (second round)

• # 🇺🇦 Marta Kostyuk (semifinals)

• # 🇷🇴 Irina-Camelia Begu (first round)

• # 🇺🇦 Anhelina Kalinina (quarterfinals)

Seeds
• #🇭🇺 Anna Bondár (qualified)

• #🇩🇪 Anna-Lena Friedsam (moved to main draw)

• #🇷🇺 Anastasia Gasanova (qualified)

• #🇷🇸 Aleksandra Krunić (qualified)

• #🇺🇦 Lesia Tsurenko (qualified)

• # Lesley Pattinama Kerkhove (qualified)

• # Ekaterine Gorgodze (first round)

• #🇸🇰 Rebecca Šramková (first round)

• #🇦🇺 Ellen Perez (withdrew, still playing in Tenerife)

• #🇷🇺 Anastasia Zakharova (first round)

• # Jana Fett (qualifying competition, lucky loser)

• #🇦🇺 Seone Mendez (qualifying competition)

Qualifiers
• #🇭🇺 Anna Bondár

• #🇷🇴 Alexandra Ignatik

• #🇷🇺 Anastasia Gasanova

• #🇷🇸 Aleksandra Krunić

• #🇺🇦 Lesia Tsurenko

• # Lesley Pattinama Kerkhove

Lucky loser
• # Jana Fett