2021 Antalya Challenger IV – Singles

Nuno Borges was the defending champion but chose not to defend his title.

Evgenii Tiurnev won the title after defeating Oleg Prihodko 3–6, 6–4, 6–4 in the final.

Seeds
• # 🇹🇷 Cem İlkel (quarterfinals)

• # 🇮🇳 Ramkumar Ramanathan (withdrew)

• # Duje Ajduković (quarterfinals)

• # 🇬🇧 Ryan Peniston (second round)

• # 🇮🇹 Riccardo Bonadio (first round)

• # 🇪🇸 Javier Barranco Cosano (second round)

• # 🇧🇦 Nerman Fatić (semifinals, retired)

• # 🇷🇸 Miljan Zekić (withdrew)

• # 🇷🇺 Evgenii Tiurnev (champion)