It's the third time Serena and Venus have played each other in a major final and after the match Serena admitted that she likes playing Venus.
"If anything I prefer to play Venus because that means that we have reached our maximum potential and that we will both go home winners" she said.
It is Serena's third Grand Slam title in a row, she won the French Open and Wimbledon earlier this year.
And now her sights must be firmly set on the Australian Open in January.
It's the only Grand Slam event she has never won.