The mechanism for starting a game in Ranked is exactly the same as in Blackbox, except you decide with your opponent if you'd like to play; the division gives coaches free choice over games. To signify you would like to play a game, put R teams you'd like to use on Gamefinder. There you will see other coaches whose teams are within the allowed TV limits from yours. If you both agree to play, you will be taken to a confirmation screen and the game will launch automatically once both coaches have confirmed they want the game. There is a rule in Ranked that you only play an opponent on average a maximum of one time per ten games. This is to ensure no groups of friends take advantage of a competitive division. To play just within a group of friends, try the League division instead.

Here's a video of the process.