History was made earlier this week at the U.S. Open, where three moms advanced to the quarterfinals of a Grand Slam for the first time in the professional era. Serena Williams, Tsvetana Pironkova and Victoria Azarenka all won fourth-round matches in New York in a first since at least 1968, when the Open Era began,…

History was made earlier this week at the U.S. Open, where three moms advanced to the quarterfinals of a Grand Slam for the first time in the professional era. Serena Williams, Tsvetana Pironkova and Victoria Azarenka all won fourth-round matches in New York in a first since at least 1968, when the Open Era began,…