Yes and no!
PIVOT Tennis works wherever you have an internet connection and a good way to see the PIVOT Tennis app on your device.
You might be tempted to think that could be done on a tennis court, and it's of course possible. But PIVOT Tennis is not designed to be used if you're actually hitting real tennis balls. Quite simply, the clip that holds the racquet sensor on is not designed for impact shocks that would occur from hitting an actual tennis ball. So if you really wanted to stand on a tennis court with really good Wi-Fi and lots of power outlets, you probably could. But striking a real tennis ball will cause PIVOT Tennis to malfunction.