Keys won their only previous match. That was in August 2012 on a hard court. She won in 3 sets.
Both players have had a great week but Muguruza has had fewer poor periods in her matches. She came under a lot of pressure from Bacsinszky and it looked like Bacsinszky would take the opening set. Muguruza fought back and again took her match in straight sets.
Strycova took the first 3 games from Keys but Keys then took the next 4 and finished off the set. The second set was close but at 4-4 Keys had a nightmare service game and threw away the set. A single late break in the third set gave her the match.
I have to favour Muguruza for the win but think she will need 3 sets. Back her if she goes a break behind in set 1.