I thought it might be interesting to list the WTA players who are still technically Juniors...
1 (16) Bencic
2 (68) Konjuh
3 (80) Ostapenko
4 (104) Kasatkina
5 (156) Kalinina
6 (171) Stewart
7 (202) Osaka
8 (203) Badosa Gibert
9 (209) Bellis
10 (217) Komardina
...
13 (294) Galfi
...
16 (377) Xu
...
32 (442) Vondrousova
...
48 (549) Swan
The comparison is not totally fair between those girls who were born in 1997, and who have almost all stopped playing Juniors, and who can play as many adult tournaments as they wish, and the rest.