Anything you need to know about the US Open tournament is found on this page:
Will there be any live matches that will be broadcasted on Tennis Channel PLUS?
The answer is NO.
Would the replay be available for the Tennis Channel PLUS subscriber?
Yes, the replays will be available after the Final, starting September 11, 2019.
Will other broadcasting company take over some matches?
Yes, ESPN has every match for the First Round to the Final.
Additional information: Since NO live matches will be broadcasted on the Tennis Channel PLUS and on the regular Tennis Channel, this website will serve as an informative page.