Us open serena williams beats sister venus to reach semi finals

I think there may be some confusion here!

Serena Williams did not play her sister Venus Williams in the US Open. In fact, Venus was eliminated in the third round of the tournament, losing to Wang Qiang of China.

Serena Williams did make it to the semifinals of the 2019 US Open, but she played and defeated Elina Svitolina of Ukraine, not her sister Venus.