1.   And at the same time, Venus and Serena Williams became the first sisters in tennis history to each own a Grand Slam title.

2.   That day marked another historic coup for the Williams sisters, who became the first sisters to claim separate titles on the same day.

3.   The first sister took the note.

4.   A primary victory for Democrat Linda Sanchez has her and Rep. Loretta Sanchez poised to become the first sisters to serve together in the U.S. Congress.

5.   Hours later, Venus won the Oklahoma City final, making the Williamses the first sisters to win WTA Tour events on the same day.

6.   If elected, they would be the first sisters to serve in Congress.

7.   On Sunday, they had plenty to say, becoming the first sisters to win WTA Tour events on the same day.

8.   The straight-set victory made them the first sisters to capture a gold in Olympic doubles.

9.   They would be the first sisters to serve in Congress.