Pregnancy leave. while more than 20 active players on the wta tour are successfully balancing motherhood with being a pro athlete, the sport s most coveted prize, a grand slam singles title, remains elusive for women who have given birth. it s been well over a decade since kim clijsters won three such titles after the birth of her daughter jada. i hope i inspire a lot of other women who are willing or hoping to do the same thing but maybe don t know the way to start. it s a great feeling to have knowing that you can combine both and still play the sport that i love but then also being a mother at the same time. reporter: this year s u.s. open is full circle for wozniacki who lost to clijsters in that 2009 u.s. open final. now she will try to make a run with her family in tow. it s important that my kids believe they can do whatever they put their minds to if they work hard enough, the sky is the limit. there s really nothing they can t do. i could not love a piece more
World number one ranking after a quick first-round win. he knocked off his first round opponent in just one hour and 34 minutes. moving on here in new york. now, many of the women s singles players in this year s u.s. open main draw share something very special in common, they re mothers. ten of those players have kids and two will play each other in the first round today, all while finding a way to balance playing tennis with raising young children. i was just looking at the clock actually. my kids are napping right now, which is awesome. reporter: these days wozniacki is playing doubles off the court, after retiring three years ago and having two children, she s back in tennis spotlight. being a mom and being a role model for my kids. and you know, for them to be able to see me play, i m very excited about that. reporter: the former world number one is one of ten women in this year s u.s. women s open draw are mothers, disproving the