This is the first time they have met.
Svitolina won the title in Kuala Lumpur but was poor in Indian Wells. She reached the 2nd round but didn’t compete well with Vinci.
Zhang reached the quarter finals as a qualifier in Melbourne and after winning an ITF title she reached the 3rd round in Indian Wells.
I would expect Svitolina to be able to win this but 3 sets are likely.
Back Svitolina if she is broken first.