the ball is in your court = it is your turn to take action / your responsibility

I realised the ball was in my court. No one else would have the same opportunity.

 

to jump the gun = to start too early

It seems I jumped the gun a bit with my announcement.

 

to be in pole position = to be in the best position to win a competition

He was in pole position and he had the fastest car.

Alfano, the secretary of Berlusconi’s party, was in “pole position” to be the right’s candidate at the elections.

 

to hit/score a bull’s eye = to achieve one’s goal/what you intended

The trio scored a bull’s eye with their new album, which combines their original songs with covers of songs by other authors.