Oprah, Nas, Kardashians, Donald Trump & More at Serena & Venus Williams' Historic US Open Clash

Posted by Odinaka on Wed 09th Sep, 2015 - tori.ng

Serena Williams says sister Venus is the toughest opponent she's ever played in her life in historic US Open clash victory against sister...and now just two games away from the Calendar Grand Slam.

World No. 1, Serena Williams continued her path to a calendar-year grand slam title after beating out big sister, Venus Williams last night in a compelling U.S. Open quarter-final.

With sports pundits commenting it was the strongest game from Venus in recent memory - breaking her sister twice in the second set, Serena recovered her strength and came out on top 6-2, 1-6, 6-3.

During an on-court interview with ESPN's Mary Joe Fernandez, Serena said;

"It's a really great moment. She's the toughest opponent I've ever played in my life and the best person I know. It's going against your best friend and at the same time going against the greatest competitior in women's tennis.

"When I'm playing her I don't think of her as my sister. When you're in the moment you don't really think about it. We trained all our lives to play on this court and on this stage in front of you guys. It's a great honor.

Rapper, Nas attends the Women's Singles Quarterfinals match between Serena and Venus Williams

"She came out hitting so hard. I was on defense a lot because she has so much power. It wasn't really easy today at all. This is a big moment for both Venus and I. We both had a chance to be in the semi-finals. It's a grand slam. We're very competitive. We're just trying to give each other a great match."

After wins at the Australian, French and Wimbledon, Serena is now just two victories from joining the exclusive club whose short membership list includes Maureen Connolly, Margaret Court and Steffi Graf.

Oprah Winfrey and Gayle King watch a quarterfinal match between Serena and Venus Williams

The last player to accomplish a calendar-year Grand Slam was Graf in 1988.

Nabbing the title would cement Serena's place as the greatest women's tennis player of all time. "I think people love to see history being made," said Venus.