By Mike Dickson for the Daily Mail
Published: 22:10 BST, 8 September 2020 | Updated: 23:40 BST, 8 September 2020
Three working mothers with three very different stories are among those making history at this year's highly unusual US Open.
Leading the March of the Mums are Serena Williams, Victoria Azarenka and Tsvetana Pironkova, all playing in the quarter-finals.
It is the first time in the modern era that three mothers are in the last eight at a Grand Slam.
Serena Williams (above), Victoria Azarenka and Tsvetana Pironkova are in the quarter-finals
Azarenka takes on Belgium's Elise Mertens and Williams will face the 32-year-old Bulgarian Pironkova who, in pure tennis terms, perhaps has the most remarkable tale of all.
Until recently, mothers were starting to look like an endangered species on the WTA Tour, but Pironkova has been the beneficiary a new rule that is a reason why that is no longer the case.
At the start of last year, the women's circuit updated their maternity rules to allow a three-year freeze on a player's ranking if they took a prolonged break to have a child.
This is now backdated to when they give birth. Pironkova had her son, Alexander, in April 2018, so is comfortably in range for playing this, her first tournament back since Wimbledon 2017.
It is the first time in the modern era that three mothers are in the last eight of a Grand Slam
That she has won four matches to get this far after such a long hiatus is incredible, and one of her victims has been