This app was mentioned in 2 comments, with an average of 1.00 upvote
There's the ATP scores app
Not sure if it shows an ace/double fault on challengers but it does on ATP level
I'm interested in new tennis too but it's very difficult to get information about these players. You can find info by reading their tweets. If they're at challenger level, many resources for draws and scores. Here's one that I use a lot ... https://play.google.com/store/apps/details?id=atpwta.live&hl=en
Futures are more difficult. Draws and schedules can be found here ... http://www.itftennis.com/procircuit/home.aspx Futures scores here ... http://m.wincomparator.com/en-gb/bet-comparator/live-score.html/sp-tennis-9/ca-itf-men-132298/