play in the big leagues
To work, compete, or participate in an area, echelon, or sphere of exceptional success, ability, power, achievement, etc. Refers to major (i.e., "big") leagues of sports teams. I know you're new here, but you need to perform much better than that. You're playing in the big leagues now. These aren't petty small-town squabbles you're involved in anymore, Senator—you're playing in the big leagues.
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.