As usual, Americans can watch live streams of 2009 U.S. Open tennis through the US Open 2009 Website.
Also, as usual, Canadians and the rest of the world can’t.
Below, I include links to two services offering live streamed 2009 U.S. Open tennis matches. When I tested these sites on Monday August 31, I could find every match I wanted to watch in English.
To schedule your viewing, the U.S. Open Tennis 2009 play schedule is here.
You can find several matches on MyP2P. You may have to click around awhile to find one that works and/or is showing the match you want in the language of your choice. Some links require a plug-in to be downloaded. I don’t trust them. I only access those that play without a plug-in.
I have had mixed results with ATDHE.NET in the past. It is easier to use than MyP2P because it lists actual matches underway. Everything worked fine when I tested it out today (August 31, 2009) however.
Please leave links in the comments if you now of other reliable places where the matches can be watched online outside of the U.S..