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Rublev-Popyrin Marathon, Tiafoe Gets Philosophical, Rybakina vs. Keys & More

by Allen McDuffee

Aug 13, 2025

THE DAILY THEORY

👋 Welcome back to The Daily Theory, our morning rundown to help you stay on top of your favorite sport. I’m Allen McDuffee, your guide to all things tennis.

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Programming note: Today’s edition is somewhat abbreviated due to travel, so I can report on a story about how a group of men is preparing for U.S. Open qualifying next week. Be on the lookout for that!

Let’s tennis!

What They Said

❝

I was trying to fight, to keep believing. In the end, somehow out of nowhere at 6-5, 30-0 for him, I make amazing returns. I was able to break him. Both of us deserved to win.

-Andrey Rublev on his three-and-a-half-hour battle against Alexei Popyrin, in which he won, 6-7, 7-6, 7-5.

On The Radar

Matches we’re monitoring today:

Cincinnati - WTA 1000 (Hard)

  • Elena Rybakina va. Madison Keys (4th round)

  • Magda Linette vs. Jessica Pegula (3rd round - TBF)

  • Aryna Sabalenka vs. Jessica Bouzas Maneiro (4th round)

  • Ekaterina Alexandrova vs. Anna Kalinskaya (4th round)

Cincinnati - ATP 1000 (Hard)

  • Frances Tiafoe vs. Holger Rune (4th round)

  • Jannik Sinner vs. Adrian Mannarino (4th round)

  • Luca Nardi vs. Carlos Alcaraz (4th round)

  • Felix Auger-Aliassime vs. Benjamin Bonzi (4th round)

  • Taylor Fritz vs. Terence Atmane (4th round)

  • Francisco Comesana vs. Andrey Rublev (4th round)

📺 Learn how to watch today’s action over at Tennis Watchers.

❤️

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Read, Watch, Listen

  • Barbora Krejcikova is finding her form once again, and it took three sets against American teen Iva Jovic to make it into the next round in Cincy.

  • The Guardian takes a look at how players are surviving on the ATP Challenger Tour.

  • Frances Tiafoe gets philosophical: “fulfillment is a journey.”

  • The Cincinnati Open asks top players how they think about momentum.

  • The WTA shows what it’s like for Maya Joint right after she finishes a match.

  • Grigor Dimitrov has withdrawn from the U.S. Open, moving Alejandro Tabilo into the main draw.

  • Jenson Brooksby has a bit of a chip on his shoulder — and he’s learning how to use it to his advantage.

  • The Cincinnati Open dropped the second episode of the documentary of the tournament and how it was revamped.

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