Muchova won't be beaten in straights. Coco could well be, but I expect 3 there.
Keys is going to have to make sure her dip from tonight doesn't bleed over to tomorrow otherwise that will be straights. She plays more like she did in the 1st vs Pegula and 2nd-3rd in the round before against the Russian, I think she's up for a set, and a shot at an upset. Sabalenka's been playing a host of counterpunchers, against them only she can beat herself. Zheng showed a slight bit of attacking ability along with a decent serve, and Sabalenka drops 4 games in a set for the 1st time all tourney. Keys' pace will cause her difficulties, but again, Keys gotta be much better than tonight.
So in short, no. Tomorrow isn't the time to continue to bet this run of straights, or rather Unders. 7 straight we're on, don't believe that will extend to 9.