Their head to heads are 2-2. Their most recent meeting was in February 2014 on a hard court. Zhang won in 3. That was their only 3 sets match.
Keys ha some problems on serve against Ivanovic, mainly in the more important games. She faced 16 break points and was broken 4 times.
I’m not sure where Zhang’s form has come from. Halep, Cornet and Lepchenko were all beaten in straight sets.
I expect Keys to come through this one but I don’t think it will be easy. She should not underestimate Zhang in this tournament. Both will suffer with nerves but Zhang is likely to be more affected.
Back Keys if she is broken first. She starts around 1.49 .