If you ever have slow workdays sometimes, like me, or you are at home, tune into the ATP Challenger page. They stream all Challenger level matches around the world. It's highly entertaining watching guys slug it out to make a living. There is usually no commentator and it's uncensored. There is a lot of swearing and classic meltdowns with umps (because there is no hawkeye).
For guys ranked outside the top 100, these guys are extremely talented.
https://www.atptour.com/en/atp-challenger-tour