Which ball is that and what is the court?
This idiom comes from tennis, which is played on a court.
When the ball is in your court, or rather half of the court, you have to deal with it.
'What do you think I should do?'
'It's up to you to decide - the ball's in your court.'
Now, I'm not a big tennis fan, but watching this, I could be - some truly amazing shots.
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