Check here on Limited Availability and Updated Prices:
$5 Grounds Pass for Men's Monday Finals
You can also get a $5 Grounds Admission Pass to watch the Men's Final at the US Open on the big screens. It can actually be a very exciting crowd outside the stadium. You can actually hear the players' shots echoing, fans cheering on both sides plus usually a better view than sitting at the very top of Ashe.
Tip: Be sure to pick up one of those Amex radios to get the play-by-play audio too. Can't beat $5 bucks!!
Actually now that I think about it, if you arrive later at night and see some people leaving the match early - you could always ask them nicely for their old ticket.
US Open Weather and Ticket Update:With severe weather canceling the 2nd men's semi-final and women's final, ticket sales are going crazy! People are trying to get rid of tickets as fast as they can tonight - Sell! Sell!
Here's the new schedule:Sunday Schedule:
Ferrer-Djokovic 11 am, Azarenka-Serena 4:30 pm.
Men's final on Monday ~5PM