Osaka kept going for it and Kasatkina kept letting her. Quickly, the matched turned into 71 minutes of ordinary. If fans were looking for fire-and ice tennis, they likely were disappointed. There was no Serena bombast, no Azarenka spunk, not even any Sharapova screeching. Just a lot of forehands and backhands. This one will not make the WTA’s top 10 highlight films.