How to evaluate Zhang Shuai's growth path?

There are quite a few straight men among Zhang Shuai fans, ranging from China Open to Australian Open. Every time Zhang Shuai plays a game, these fans will raise the national flag and shout for Zhang Shuai at the top of their lungs. Unlike Serena or Naomi Osaka, watching the game in Zhang Shuai often makes people feel very moved. Her physical fitness is not excellent, but she can also beat the Hungarian fierce woman Babos; Her technique is not top-notch, but she also knocked out Halep, the world's number one. Although physical fitness, skills and talents are not in the forefront, Zhang Shuai's willpower can definitely rank in the top five in WTA. Every coach in Zhang Shuai was deeply impressed by her willpower, and she knew that her competitive personality finally made her reach the peak of the Grand Slam at the age of 30: "I have always been eager to fight, eager to make progress by my own efforts and become a better tennis player by myself."