2017 Apia International Sydney – Men's singles

Viktor Troicki was the two-time defending champion, but lost in the semifinals to Gilles Müller.

Müller went on to win his first ATP title, defeating Daniel Evans in the final, 7–6(7–5), 6–2.

Seeds
The top four seeds receive a bye into the second round. • #🇦🇹 Dominic Thiem (quarterfinals)

• # Pablo Cuevas (quarterfinals)

• #🇷🇸 Viktor Troicki (semifinals)

• #🇪🇸 Pablo Carreño Busta (quarterfinals)

• #🇩🇪 Philipp Kohlschreiber (quarterfinals, withdrew)

• #🇱🇺 Gilles Müller (champion)

• #🇸🇰 Martin Kližan (first round, retired with foot injury)

• #🇪🇸 Marcel Granollers (second round)

Seeds
• # 🇫🇷 Paul-Henri Mathieu (first round, retired)

• # 🇺🇦 Illya Marchenko (first round)

• # Gastão Elias (qualified)

• # 🇧🇷 Thiago Monteiro (qualified)

• # 🇰🇿 Mikhail Kukushkin (first round)

• # 🇨🇴 Santiago Giraldo (Qualifying Competition, lucky loser)

• # 🇷🇸 Dušan Lajović (first round)

• # Nikoloz Basilashvili (qualifying competition, lucky loser)

Qualifiers
• # 🇦🇺 Matthew Barton

• # 🇦🇺 Christopher O'Connell

• # Gastão Elias

• # 🇧🇷 Thiago Monteiro

Lucky losers
• # 🇨🇴 Santiago Giraldo

• # Nikoloz Basilashvili