Two years ago, Zhang Shuai won her first career main-draw Grand Slam match on Margaret Court Arena—on her 15th attempt. Her opponent was a world No. 2-ranked Simona Halep, and Zhang rode that unexpected way all the way to the quarterfinals.
This year, she pulled off another upset on the same court over No. 13-seeded Sloane Stephens, 2-6, 7-6 (2), 6-2. Here's match point: