It must be difficult being Serena’s Williams sister. The best tennis player in the world does one thing and one thing only, that is winning.

And as Venus found out for the umpteenth time on Tuesday, it doesn’t matter who is on the other side of the net. And especially being an older sister, there should be days where she must feel so enthused looking at her sister’s success.

But Serena is a doting sister in that regard. Just after winning their US Open Quarter final to inch closer to another title, she showed great appreciation to her sister.

Serena shared a collage with some adorable throwback photos in there.

“She has my heart. ❤️ Memories make my heart filled with more joy than I can express. A lifetime with @venuswilliams will not be enough.” She wrote about her sister.

How cute!