Serena Williams is so focused on winning an eighth Wimbledon title that she missed baby daughter Olympia's first steps. Williams has travelled to the All England Club with Olympia, but her parental duties have to be put on hold while she prepares for her matches. That means sometimes being away while Olympia is taking major steps in her growth -- including walking for the first time.

Williams, who gave birth in September, advanced to the Wimbledon fourth round with a win over Kristina Mladenovic on Friday. And just hours later, the 36-year-old said she had been in training when Olympia took her first steps. "She took her first steps... I was training and missed it. I cried," Williams wrote on Twitter.