Of course, Serena has also made her 4th consecutive tournament final, so she's also playing remarkable tennis as expected.
Serena going for her 50th singles title and Maria going for her 30th title in her 50th final. And we all know how much Serena loves one-upping Maria.
Just to reiterate, Serena has not been legitimately beaten on a tennis court since last year's French. A tank against Kerber in Cincy and 2 injury and illness aided losses this year. Serena is in another universe but Maria is going to give it everything she has, like in all her matches, and that's all we can expect from her.