A couple of Grand Slam champions on the women's side secured their spots in the semifinals while the most promising players on the men's side took a step closer to their first major title.
These are the Top 5 photos from the US Open.
Medvedev found himself in two close set tiebreakers, but because he did such an outstanding job with managing himself and sticking to the game plan, he came out with a straight set win. The No. 3 seed posted a 7-6 (6), 6-3, 7-6 (5) victory over his longtime friend Andrey Rublev to advance into his second consecutive US Open semifinal.
"Maybe first time in actually a year, I actually celebrated my win because it was very tough at the end and I felt like I could get in trouble," Medvedev said in on-court interview. "So, I was really happy to get the win in this tough tiebreaker. Actually, one point decided two sets, it was a really tough match."