Ten days of tennis and 126 competitors later, it’s the Williams Sisters who will verse each other in the final of the Australian Open where age is continually triumphant over youth. Older sister Venus defeated young American Coco Vandeweghe in two hours 26 minutes to reach her first grand slam final since Wimbledon in 2009, changing tactics in the second set after dropping her first set of the tournament against an opponent “who is just on fire.”