ATP Tour

Cobolli v Fils, Tiafoe v Nakashima: All you need to know about Cincinnati SFs

The semi-final lineup for the 2026 Cincinnati Open is set. Roland Garros finalist Flavio Cobolli meets 21st seed Arthur Fils and later, Montreal runner-up Brandon Nakashima faces 2024 Cincinnati finalist Frances Tiafoe.

A first-time ATP Masters 1000 champion is guaranteed in Ohio. With Tiafoe and Nakashima in the semis, it marks the first time since 2010 (Andy Roddick, Mardy Fish) that two American men have reached this stage of the Cincinnati Open. First, Fils will look to extend his perfect 2-0 Lexus ATP Head2Head record against Cobolli, the highest seed remaining.

Both semi-final matches will take place on Saturday. ATPTour.com breaks down everything you need to know ahead of the action.

Who is playing in the 2026 Cincinnati semi-finals?

Flavio Cobolli, Arthur Fils, Frances Tiafoe and Brandon Nakashima all feature in the 2026 semi-final lineup at the Cincinnati Open. Cobolli is playing in his first ATP Masters 1000 semi-final, while Fils is competing in his third this season (Miami, Madrid). Nakashima is in his second consecutive semi-final at this level, having reached the Montreal final last week. Tiafoe is in his third ATP Masters 1000 semi-final and first since reaching the final at this very tournament in 2024.

When are the 2026 Cincinnati semi-finals?

Both Cincinnati semi-finals will take place Saturday, 22 August. Seventh seed Flavio Cobolli meets 21st seed Arthur Fils not before 1:30 p.m. local time. The 17th seed Frances Tiafoe faces 27th seed Brandon Nakashima not before 6 p.m. local time.

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What is the head-to-head record between Cobolli and Fils?

Arthur Fils is a perfect 2-0 in his Lexus ATP Head2Head series with Flavio Cobolli. Fils beat Cobolli 6-2, 6-4 in Monte-Carlo last year and at the 2023 Next Gen ATP Finals with a 4-1, 4-2, 4-2 victory.

What is the head-to-head record between Tiafoe and Nakashima?

Frances Tiafoe holds a 6-1 advantage over Brandon Nakashima, including a win in the Acapulco semi-finals this year (3-6, 7-6(6), 6-4).

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How many ATP titles has Cobolli won?

Flavio Cobolli, fourth in the PIF ATP Live Race To Turin, holds three ATP Tour titles, including the ATP 500 in Acapulco this February. Last year, he won in Bucharest and in Hamburg.

How many ATP titles has Fils won?

Arthur Fils is a four-time ATP Tour champion. The Frenchman won in Barcelona this year, adding to his title haul. Fils triumphed in Tokyo and Hamburg in 2024, while his first tour-level title came in Lyon in 2023.

How many ATP titles has Tiafoe won?

Frances Tiafoe has lifted four ATP Tour trophies, with his most recent coming on the Halle grass this June. Tiafoe won the Stuttgart and Houston title in 2023. He first triumphed in 2018 in Delray Beach.

How many ATP titles has Nakashima won?

Brandon Nakashima’s lone ATP Tour title was a memorable one. The San Diego native won his hometown tournament in 2022.

What is the prize money and points at stake for the semi-finalists in Cincinnati?

2026 Cincinnati Men's Singles Prize Money & Points