SF: Krejcikova/Siniakova
This is a real interesting one.
Strycova into the SF in both singles and doubles, there's always a chance she could withdraw from the doubles SF given how she goes against Serena and if she's worried about any injuries. If she does withdraw then anyone who picks Babos/Mladenovic goes straight through to the final as we don't do Backups in the SF/Final. So you'd heavily consider going for Babos/Mladenovic in that case but they barely scraped through against Melichar/Peschke only winning 9-7 in the 3rd.
So instead i've gone for the defending champs who hopefully will get through which will mean I have either team from the top half for the final.
I know I didn't have to justify it but I wanted too