Surveillance video has emerged of tennis champion Serena Williams chasing a cell phone thief outside a San Francisco restaurant.
The star revealed on Facebook how she used her "superhero sense" to run after the man who she said took her phone while she ate dinner.
She caught up with the man, who she said claimed he had picked up the phone in error.
"I was proud. I just showed every man in there I can stand up to bullies and other men," she wrote. "It was a win for the ladies! Just because you are a lady don't be afraid to step up to any challenge and not be a victim but a hero!"