Serena Williams Moves Closer to Tennis History at the US Open

The tennis superstar was on the attack against Madison Keys, setting up an emotional showdown with sister Venus.
1:36 | 09/07/15

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Transcript for Serena Williams Moves Closer to Tennis History at the US Open
It will be the match of the tournament. Se rear that versus Venus. Serena Williams may have struggled through her last match. She was on the take right from the start against number 19 seed Madison cease. Setting up a Williams sisters showdown. In the end, it was all Serena. Ace from Serena. Oh. Whoo! Reporter: The 33-year-old Williams, thoroughly dominating play over fellow American Madison keys, a player 13 years her junior. Serena's been just great today. Reporter: It was a tough Dayton court for the upstart, keys. Trying to do a Serena split. Reporter: With her win, she sets up matchup with big sister, Venus Williams, who also won easily Sunday. She's playing great. I barely had time the get ready because she played so fast. Reporter: Venus stands in the way of sir veerena making history. The first grand slam in almost 30 years. Back in 2001, Venus was the favorite and won the match. This time, the table's turned. With Serena expected to win. One thing is for sure. A will lams will be in the semis. So that's good. Reporter: And that sister act clash. Serena against Venus takes place tomorrow. The 26th meeting. Serena has won 14 of those 26. Can't wait to watch it. You can catch all the coverage starting at 11:00 eastern on espn2. We have a lot more coming up.

This transcript has been automatically generated and may not be 100% accurate.

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