Alcaraz, Sinner and more! Here's what we'll be watching on Thursday at the Open.

"Oh my God, it’s such a big win,” qualifier Elena-Gabriela Ruse said after stunning Wimbledon champion Barbora Krejcikova 6-4, 7-5 to reach her first major third round.

The tennis - and temperatures - will heat up on Day 3 at the US Open .

Alcaraz surged at the finish to earn his 15th straight Grand Slam win.

World No. 1 Jannik Sinner, after being exonerated for potential doping, earned his first ever win on Arthur Ashe Stadium at the US Open.

Naomi Osaka crushed Jelena Ostapenko 6-3, 6-2 in a US Open first-round clash of Grand Slam champions to score her first Top 10 win in four years.

Coach Gabe Jaramillo traces the evolution of PEDs in tennis, responds to the Jannik Sinner case and asserts players "are a result of their actions and inactions."