FILE PHOTO (EDITORS NOTE: COMPOSITE OF TWO IMAGES - Image numbers (L) 632625644 and 632340970) In this composite image a comparision has been made between Serena Williams of the United States (L) and Venus Williams of the United States. The Williams sisters play each other in the 2017 Australian Open Women's Final on January 28, 2017 at Melbourne Park. ****LEFT IMAGE*** MELBOURNE, AUSTRALIA - JANUARY 25: Serena Williams of the Unites States serves in her quarterfinal match against Johanna Konta of Great Britain on day 10 of the 2017 Australian Open at Melbourne Park on January 25, 2017 in Melbourne, Australia. (Photo by Cameron Spencer/Getty Images) ***RIGHT IMAGE*** MELBOURNE, AUSTRALIA - JANUARY 22: Venus Williams of the United States serves in her fourth round match against Mona Barthel of Germany on day seven of the 2017 Australian Open at Melbourne Park on January 22, 2017 in Melbourne, Australia. (Photo by Cameron Spencer/Getty Images)
Getty Images

Getty Images Sport Cameron Spencer