Seeded No. 2 at the Transylvania Open, the Estonian will need to win a fourth title in two months to unseat Jabeur in the Race to Guadalajara.

Anastasia Gasanova of Russia saved two match points before outlasting fourth-seeded Jil Teichmann, 4-6, 6-0, 7-5, in the first round of the Transylvania Open.

Top-ranked Novak Djokovic and U.S. Open champion Daniil Medvedev headline the rosters for the Davis Cup Finals that begin next month

American Sebastian Korda has advanced to the second round of the St. Petersburg Open with a 7-6 (2), 7-5 win over Nino Serdarušić.

The 20-year-old Italian k four titles in 2021 and reached his first Masters 100 final in Miami.

Bettles was initially hired as a hitting partner and ultimately worked with the former world No. 3 for five years.

Jannik Sinner, Cam Norrie and Aslan Karatsev also move up to new highs on Monday’s ATP rankings.

Vaccinated players "are not required to quarantine or stay in a bubble, will have no ongoing restrictions imposed on them," and "will have complete freedom of movement."

"I'm not celebrating a lot," Karatsev said. "A team dinner and then tomorrow or the next day we'll go to St. Petersburg."

The tours make the final turn and start down the 2021 homestretch with four events.

Eager to learn, listen—and emulate some of the game’s greatest players—the young American embraces each mile marker on her voyage to turn Grand Slam dreams into realities