She has reached eight of the last 10 Grand Slam finals dating to the 2014 U.S. Open .
The presence of Serena Williams , who will be 36 in September , is the element most predictable .
Serena Williams has reached eight of the last 10 Grand Slam finals dating to the 2014 U.S. Open .
The presence of Serena Williams , who will be 36 in September , is the element most predictable .