OK guys this is slightly complicated so read carefully. I have a way for you to watch some tennis, although whether that will include the murray match later i don't know!
Go to http://www.pplive.it/
and download the little programme and install it. Its all in chinese so just use a bit of common sense and you will get there.
Then once you have that downloaded, installed, and running (it will run down in the right hand taskbar bit) go back to the main page and scroll down the channel list until you come to a channel that reads "Peaceful star super sports ". Then click on where it says "play" and then wait. Within 40 secs max windows media player will open and you will have some live tennis! If you change your settings off default buffering and put it up to about 30 secs it will run fine. For anyone without sky it is very useful and will allow you to watch some tennis anyway. I just watched the end of the Hewitt match, it buffered a bit to begin with but then it was fine!