Sean Randall breaks down what was a crazy day of upsets at the US Open Saturday.

Things will be heating up at the US Open this weekend with a some great matchups.

“I haven’t been introduced to his game. So I didn’t know what to expect,” Djokovic said. “I knew he’s a big guy with a big serve, lefty. So, you know, I haven’t watched it. So it’s always dangerous in these positions. But that’s why I needed to really stay focused and try to read his game and try to be able to recognize the positions and his disadvantages.”

Andre Agassi held a press conference after his Monday night spectacle at the US Open, the highlights: On his academy: “I’m not educating because I was educated. It was quite the contrary. Not only did I leave Bradenton Academy in the ninth grade, but eighth grade was the best three years of my life.”

Sean Randall breaks down the US Open draw.

“I’ve talked about it a lot, and if you want to read some answers that I said, you know, you can,” the younger Williams sister said. “But I think we should talk about something else. It’s more exciting, more new…Any other questions that’s not about No. 1?”

WHICH WILLIAMS SISTERS ARE YOU WATCHING? — Wall Street Journal with the headline “Advantage, Williams: As they enter the U.S. Open, Venus and Serena are stronger, faster and more focused than ever. How they came back from years of inconsistency to dominate the sport” by Matthew Futterman. Wha? Dominate the sport? Neither are No. 1 ranked; between Wimbledon and the US Open Venus had a 5-3 win-loss record with no titles, and Serena was 6-3 with no titles. Domination!

Live interview with Federer is a good effort, talking about the twins, being “only 28 years old,” traveling with the kids, etc. Good hair day for Rog. Says Andy Roddick was “never really gone” out of the top-level players, has improved and is moving better.

Just for fun, I am trying something different. As the 2009 hard court season heads toward the finish line, I came up with some hypothetical matches between former U.S. Open champions.

Roger Federer and Novak Djokovic will meet for the 2009 Cincinnati Masters title.