I found some interesting stuff in interview with Sandra Zaniewska - Polish player - about Aleksandra Krunić.
Who is your best friend in world tour?
Aleksandra Krunić, who unfortunately already lost. We made the final of junior Australian Open in doubles. We've known each other for seven year. We met when I was 13 and she was 12. I think that's my the only close friend on Tour which has survived so many years - until now.