Serena Williams might be struggling to watch her sister, Venus Williams, play with someone else, but that's not stopping Venus from publicly calling her out (all in good fun, though, of course).
After she and partner Leylah Fernandez won their third-round doubles match at the U.S. Open on Monday, Venus sent a funny message to her sister, who had only days prior shared a funny social media post lamenting Venus's success in another duo.
