2023 Western & Southern Open – Men's singles

Novak Djokovic defeated Carlos Alcaraz in the final, 5–7, 7–6(9–7), 7–6(7–4) to win the men's singles tennis title at the 2023 Cincinnati Masters. He saved a championship point en route to his third Cincinnati Masters title and record-extending 39th ATP Tour Masters 1000 title overall; it was his ninth career title won after saving match points during a tournament. It was the second time he saved a championship point en route to a title in 2023, with the first instance occurring in Adelaide. At 3 hours and 49 minutes, this match was the longest best-of-three-sets ATP Tour final and the longest match in the tournament's history.

Borna Ćorić was the defending champion, but lost in the second round to Hubert Hurkacz.

Alcaraz and Djokovic were in contention for the ATP No. 1 singles ranking. Alcaraz retained the top ranking by reaching the final. This was Djokovic's first tournament in the United States since the 2021 US Open, following the lifting of COVID-19 vaccination requirements for international air travelers in May 2023.

The final between Alcaraz and Djokovic was ranked ATP Match of the Year.

Seeds
The top eight seeds received a bye into the second round. • 🇪🇸 Carlos Alcaraz (final)

• 🇷🇸 Novak Djokovic (champion)

• Daniil Medvedev (third round)

• Stefanos Tsitsipas (third round)

• 🇳🇴 Casper Ruud (second round)

• Holger Rune (second round, retired)

• Andrey Rublev (second round)

• 🇮🇹 Jannik Sinner (second round)

• 🇺🇸 Taylor Fritz (quarterfinals)

• 🇺🇸 Frances Tiafoe (second round)

• Karen Khachanov (withdrew)

• 🇨🇦 Félix Auger-Aliassime (second round)

• 🇬🇧 Cameron Norrie (first round)

• 🇺🇸 Tommy Paul (third round)

• Borna Ćorić (second round)

• 🇩🇪 Alexander Zverev (semifinals)

Finals


Seeded players
The following are the seeded players. Seedings are based on ATP rankings as of 7 August 2023. Rank and points before are as of 14 August 2023.

Wild cards
• 🇺🇸 John Isner

• 🇺🇸 Mackenzie McDonald

• 🇺🇸 Brandon Nakashima

•  Stan Wawrinka

Protected ranking
• Lloyd Harris

• 🇫🇷 Gaël Monfils

Withdrawals
• 🇪🇸 Roberto Bautista Agut → replaced by Roman Safiullin

• 🇰🇿 Alexander Bublik → replaced by 🇺🇸 J. J. Wolf

• 🇪🇸 Pablo Carreño Busta → replaced by 🇮🇹 Lorenzo Sonego

•  Marin Čilić → replaced by 🇷🇸 Miomir Kecmanović

•  Karen Khachanov → replaced by 🇦🇺 Alexei Popyrin

• 🇦🇺 Nick Kyrgios → replaced by 🇫🇮 Emil Ruusuvuori

• 🇬🇧 Andy Murray → replaced by 🇩🇪 Daniel Altmaier

• 🇨🇦 Milos Raonic → replaced by 🇫🇷 Richard Gasquet

• 🇨🇦 Denis Shapovalov → replaced by 🇩🇪 Yannick Hanfmann

• 🇩🇪 Jan-Lennard Struff → replaced by  Lloyd Harris

Seeds
• # 🇷🇸 Laslo Djere (first round)

• # 🇫🇷 Arthur Fils (qualified)

• # 🇩🇪 Daniel Altmaier (qualifying competition, lucky loser)

• # 🇦🇺 Jordan Thompson (qualified)

• # 🇦🇺 Alexei Popyrin (qualifying competition, lucky loser)

• # 🇭🇺 Márton Fucsovics (first round)

• # 🇦🇺 Aleksandar Vukic (withdrew)

• # 🇨🇳 Zhang Zhizhen (qualifying competition)

• # 🇮🇹 Matteo Arnaldi (first round)

• # 🇷🇸 Dušan Lajović (qualified)

• # 🇨🇴 Daniel Elahi Galán (qualifying competition)

• # 🇫🇷 Luca Van Assche (first round)

• # 🇺🇸 Marcos Giron (first round)

• # Aslan Karatsev (first round)

Qualifiers
• # 🇦🇺 Thanasi Kokkinakis

• # 🇫🇷 Arthur Fils

• # 🇫🇷 Corentin Moutet

• # 🇦🇺 Jordan Thompson

• # 🇦🇺 Max Purcell

• # Alexander Shevchenko

• # 🇷🇸 Dušan Lajović

Lucky losers
• # 🇩🇪 Daniel Altmaier

• # 🇦🇺 Alexei Popyrin