The "World Tour" of the game is a very realistic offline World Tour, with +5000 players and +350 tournaments in which you can have 1 to 4 players fighting to be the #1.
There is also an online Tour that you can check here in the forum, in which you are able to play with other players around the world!
Read some of the game features here
https://www.managames.com/tennis/game_en.html