A1 sport league
This is a list of sport leagues designated A1. The entries are sorted by sport and by countries.
Sports
- Baseball
- A1 baseball league (Italy)
- Class A1 (baseball), a defunct classification within Minor League Baseball
- Basketball
- A1 basketball league (Albania), the first professional league
- A1 basketball league (Bosnia and Herzegovina)
- A1 basketball league (Bulgaria), the second professional league
- A1 basketball league (Croatia)
- A1 basketball league (Greece)
- Inline Hockey
- A1 inline hockey league (Italy), a league composed of eleven professional teams
- Volleyball
- A1 volleyball league (Greece)
- A1 volleyball league (Italy)
- A1 volleyball league (Portugal)
- A1 women's volleyball league (Portugal)
- Water polo