Noskova never appeared in Washington: the WTA's official main draw for the Mubadala DC Open, played 27 July to 2 August, does not list her, and the title went to Alexandra Eala.
The opening-match market resolves on the official WTA draw and results for the Mubadala DC Open (wtatennis.com, tournament 1045). Her opening match is her first main-draw singles match in Washington, regardless of round number or a bye. If Noskova withdraws before playing it, the market resolves NO.
We looked at the last six women who won their first Grand Slam title, and at their first match at their next event. Three won it and three did not. One of the three who did not win never got on court at all.