Who has beaten Serena Williams the most?

Serena Williams was the most dominant women's tennis player in the past two decades.

At that time, there were not many players who beat Serena Williams.

In Serena's whole career, only five players were able to beat her more than four times.

Now the question is which player beat Serena Williams most time.

And the answer is her older sister Venus Williams.

Serena Williams and Venus faced off 31 times in women's singles.

And Venus Williams beat her sister Serena Williams 12 times.