With the points numbered 15, 30, 45, and 60 (or game), the show's title is '15/Love' meaning that it is the first point. When Adena has a crush on a french player and discovers that he has a girlfriend, and he is not as great as he seems, there seems to be two points against Adena from hooking up with her object of affection, hence two points - 30/love.
The episode title, '30/Love' is a pun from the show's title, 15/Love.
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