The Sportimes took the lead for the first time during the mixed doubles, with Kendrick and Harkleroad finishing off Kerr and Karolina Pliskova, 5-2, for a 13-11 New York advantage.
Hingis lifted the Sportimes' advantage to 18-12 with a 5-1 singles win over Karolina Pliskova, before Witten provided the final margin with a 5-4 triumph over Gregorc.
It was the second straight home match victory for the Sportimes over Philadelphia, as they recorded a 22-16 win over the same Freedoms team on Friday. The victory moved the Sportimes 1 1/2 games ahead of the Freedoms for second place in the WTT Eastern Conference standings.
New York (4-2) is back in action at Sportime Stadium on Thursday when John McEnroe leads the team vs. Andre Agassi and the Boston Lobsters. Proceeds from the matchup benefit the Johnny Mac Tennis Project, McEnroe's not-for-profit foundation.
The Freedoms (3-4) host the Orange County Breakers at The Pavilion at Villanova University on Thursday.
NY Sportimes 23, Philadelphia Freedoms 16
Men's Doubles - Luka Gregorc/Jordan Kerr (Freedoms) def. Robert Kendrick/Jesse Witten, 5-3
Women's Doubles - Ashley Harkleroad/Martina Hingis (Sportimes) def. Kristyna Pliskova/Karolina Pliskova, 5-4
Mixed Doubles - Harkleroad/Kendrick (Sportimes) def. Kerr/Karolina Pliskova, 5-2
Women's Singles - Hingis (Sportimes) def. Kristyna Pliskova, 5-1
Men's Singles - Witten (Sportimes) def. Gregorc, 5-4