First, tap on the star icon on the top right of your Home Screen.  Next, search for desired tennis players by name.  You can choose to view the player before you add or just add him/her immediately. Viewing the player by tapping its icon may help confirm he or she is the tennis player you're seeking.   Add the player to your Home Screen by tapping the blue + symbol.  Both the Top 100 ATP & Top 100 WTA are available to follow.  Tennis competitions such as Wimbledon are available to follow when relevant.