When they weren’t working together as a team, they were pitted against each other in singles matches.

“I know when I play her, I have to play some of my best tennis.

She does, too … Serena was considered a newcomer who could potentially beat her sister in the second round.

Venus Williams, Serena Williamson the red carpet

But when it came to the match, Venus outplayed her little sister and won 2-0.

However, Serena could’ve been happier with who she was against.

Instead, they saw themselves as simply sisters.

Venus and Serena Williams on the court at the Australia Open

Essentially, the sisters really don’t care about beating each other.

Serena and Venus Williams at US Open 2013