Not many players have won more matches in the last nine months than Barbora Zahlavova Strycova - she's won 33 of them since the start of the grass court season last June. And all of that winning has brought her a big reward on this week's WTA Rankings - her long-deserved career Top 20 debut.
Kvitova is currently ranked No.4, Safarova No.11, Pliskova No.15 and Zahlavova Strycova No.20.
But back to the big breakthrough of the week, Zahlavova Strycova, and it's even more incredible given she left last year's French Open at No.62 in the world - nine months later and she's No.20.
"I feel my game has evolved a lot since I started working with my coach, Jerome Adamec," Zahlavova Strycova said. "He has taught me many new things, but the biggest change is I can focus on tactics more. He showed me I can see the game a little differently, and I enjoy learning new things."
What has been the Czech's fondest memory in these last nine months?
"I can't pick one, but if I could pick a few, they would have to be reaching the quarterfinals of Wimbledon and the tournament in Birmingham. I played some amazing matches at Wimbledon and enjoyed every moment of it. That's why I work so hard every day, to have moments like I did there."
And on breaking the Top 20, something she's been on the brink of for months?
"It means a lot to me," Zahlavova Strycova said.
"If somebody told me I'd do this two years ago when I came back, I wouldn't believe it. But it's here and it shows why you work so hard. I work hard every day, even making the small things better."
There's more to come, too.
"I'm very happy to break the Top 20, but I will continue to keep working on my game."
Zahlavova Strycova has little to defend until the aforementioned grass court season - she won just four of 10 WTA main draw-level matches between now and the grass court season last year.