Serena Williams, Sam Stosur and Martina Navratilova are among the women tennis stars appearing in a new video asking for help to fight Motor Neuron Disease.
During last year's Australian Open, the tennis family came together to make videos to help raise awareness about the disease, with the goal of raising $100,000 for research.
That goal was reached, but the battle goes on.
The Laugh To Cure Motor Neuron Disease campaign has been working together with the Cure For Motor Neuron Disease foundation and have produced a new video that tells the devastating story of the disease.
