ball's in your court, the

Idioms  

1. It's your responsibility now; it's up to you. For example, I've done all I can; now the ball's in your court. This term comes from tennis, where it means it is the opponent's turn to serve or return the ball, and has been transferred to other activities. [Second half of 1900s]

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Example Sentences

The Ball’s in Your Court The next time you’re inclined to think your boss hasn’t done anything good for you, remember he or she may be working to help you retire comfortably to that second home down South.

From US News