Tennis legend Serena Williams has often spoken of her struggle to spend quality time with her daughter, Olympia, two, as she needs to be constantly away, for her professional tennis commitments. Many working mothers go through the same struggle.

In a bid to help these working mums, Serena has joined a Chicago-based start-up, The Mom Project, as strategic advisor. The 23-time Grand Slam champion, will help professional companies hire working mums through an online project. "I'm calling on CEOs, Heads of People and Business Leaders big and small. If you're hiring, are you considering hiring moms? Together, we can influence how work gets done and build a better workplace," said the former World No. 1.