on the ball
US /ɑn ðə bɔl/
UK /ɑn ðə bɔl/

1.
atento, alerta, espabilado
alert, attentive, and quick to understand and react to things
:
•
You need to be on the ball if you want to succeed in this competitive industry.
Necesitas estar atento si quieres tener éxito en esta industria competitiva.
•
Our new manager is really on the ball; she quickly identified the problems.
Nuestra nueva gerente está realmente atenta; rápidamente identificó los problemas.