What we're watching tonight:
- USA (1080i) has U.S. Open at 7 p.m.
- CW (1080i) brings the series premiere of 90210 at 8 p.m.
- ABC Family (720p) has The Secret Life of the American Teenager at 8 p.m. and Greek at 9 p.m.
- ABC, CBS, NBC, CNN & PBS cover the Republican National Convention at 10 p.m.
- A&E (720p) has The Cleaner at 10 p.m.
- Sci Fi (1080i) brings ECW at 10 p.m.
- Discovery (1080i) has Smash Lab at 10 p.m.
- ESPN HD (720p) has the 2008 WSOP at 8 & 9 p.m.
- ESPN2 HD (720p) has Hey Rookie, Welcome to the NFL (Part 1) at 8 p.m.