Each morning here at the Observer's U.S. Open blog we're going to tell you what to look out for in the day's action. Today's tip: arrive early!

The heavy-hitters -- Jelena Jankovic, Justine Henin, Roger Federer -- will steal the spotlight at Arthur Ashe today. But you know how these first-round matches go: some of them are over in 40 minutes. If you have a pass that lets you into Arthur Ashe, don't be late.  read more »