Tired of searching for ATP or WTA tournament stats, downloading countless tennis apps for major tournaments, or frustrated by interrupted television matches. Then Tennis 24 is for you. As part of 24sportnetwork.com they provide a...
...Tennis results service [that] offers an ultimate tennis resource covering major tennis events as well as challengers and ITF tournaments. Tennis live scores and results are also provided with set results, H2H stats and other tennis live score information. Get live ATP tennis, live WTA tournaments, Challengers online, ITF tournaments and tennis team competitions - all at Tennis24.com.
At last count, they cover 2,401 tennis tournaments per year from every country in the world that has them (they're too numerous to list) , all with live scoring, results, stats and optional odds. Nor do you need to be tied to computer, you can get the results on your mobile device from the Apple App Store or Google Play. They're free.
The categories, rankings, and current tournaments they cover is all-inclusive as shown in this screenshot from Tennis24.com:
Moreover, the rankings are not just a list, but details their opponents. For example, below are screenshots of the ATP top three as of July 2018: