2018 AON Open Challenger – Singles

Stefanos Tsitsipas was the defending champion but chose not to defend his title.

Lorenzo Sonego won the title after defeating Dustin Brown 6–2, 6–1 in the final.

Seeds
• # 🇫🇷 Benoît Paire (withdrew)

• # 🇸🇰 Martin Kližan (second round, retired)

• # 🇮🇹 Paolo Lorenzi (second round)

• # 🇵🇱 Hubert Hurkacz (quarterfinals)

• # 🇦🇷 Federico Delbonis (semifinals)

• # 🇦🇷 Guido Andreozzi (first round)

• # 🇧🇷 Thiago Monteiro (first round)

• # 🇮🇹 Lorenzo Sonego (champion)