With billionaire celebrities and fellow Americans Donald Trump and Oprah Winfrey as well as among others sisters Kim Kardashian and Kendall Jenner looking on from the stands, the 23rd seeded Venus Williams began the match hitting powerful serves down the tee, forceful groundstrokes and swinging volleys to take a 2-1 first set lead.
Serena held serve to pull even at 2 games all.
Then serving in the following game, Venus fought off a breakpoint before striking a 121 miles per hour serve down the tee to set up game point.
However a Serena drop shot, backhand pass down the line winner combination followed by a netted Venus cross court forehand sealed the break of serve which put Serena ahead 3-2.
Venus' continued her high level of play but delivered several additional costly errors which resulted in Serena winning the last five games of the set.
But then tied at one game all in set two, Venus overpowered her sister with aggressive ground strokes and serves, including a 115 miles per hour ace down the tee and into the body serves to herself win the last five games of set two and force a decisive third set.
Serena hit a down the line forehand winner which she followed up with two aces to hold serve and start the final set with a 1-0 lead.
Then in the game which would become perhaps the most important game of the match, Venus struck an ace out wide to lead 15-0 before netting a crosscourt forehand to level the game at 15 all.
Venus then delivered two consecutive attachable second serves; both of which Serena returned with backhand return winners to lead 15-40.
A Serena down the line backhand winner on the following point awarded her the key and only break of serve in set three as she went ahead 2-0.
The final set otherwise remained on serve with both sisters striking nearly identical aces down the tee on several occasions to put the score at 5-2 and then 5-3.
In the final game of the night with Serena serving for the match, Venus; who hits harder ground strokes with less topspin than her sister but also produces as a result sometimes costly errors, hit a crosscourt forehand return long to trail 15-0.
Venus then struck a down the line forehand winner to level the game at 15 all which she followed up with a crosscourt backhand long to trail 30-15.
A Venus down the line forehand hit long set up double match point for Serena.
Serena then struck a 107 miles per hour ace out wide to hold serve and end the match after one hour and 38 minutes of play.
Today in the semifinals, Williams takes on the unseeded Roberta Vinci of Italy as the American finds herself only two wins away from achieving the almost unthinkable Grand Slam, the greatest achievement in professional tennis.