Zhang upset the No. 5 seed 6-4, 5-7, 6-2, 0-6, 6-2 to reach the third round of a Grand Slam tournament for the second time.

All three members of the groundbreaking group—Shang Juncheng, Wu Yibing and Zhang Zhizhen—played their opening matches on Monday, with Zhang advancing to the second round.

Also: Jan-Lennard Struff soars to a new career-high, the battle for No. 1 heats up on both the ATP and WTA rankings, and American Taylor Townsend breaks into the Top 10 in doubles.

The Australian Open champion is now a win away from taking home the crown at the Caja Magica for a second time in three years.

Before each day's play at the Mutua Madrid Open, we'll preview three must-see matches.

The 26-year-old is through to the last eight in Madrid after a nail-biting fourth-round victory over Taylor Fritz.

Before each day's play at the Mutua Madrid Open, we'll preview three must-see matches.

If it's action you're looking for, a loaded Day 2 in Melbourne is the place to be.

Zhang Zhizhen moves into the main draw as a result of the American pulling out.

Also, Jessica Pegula sets a new high of No. 3, Coco Gauff breaks the Top 5 and Zhang Zhizhen becomes the first Chinese man to reach the Top 100 in ATP rankings history.