Simply put, you need a long lense with a wide open aperture (2.8). You need to set your ISO high (as high as your camera will allow) and you need to shoot 1/1000 or faster, to stop the action. Then understanding the game, where the action is, where it is going and what is likely to happen next, helps a lot, in being prepared for the next shot.
If you have a few dollars to spare and really want to improve your night photo shots. Take a look at B&H Photo (http://www.bhphotovideo.com/) they have all the best gear at about as good a pricing you will find. They even have a used/refurbished section, for some really great deals (http://www.bhphotovideo.com/c/buy/SLR-Interchangeable-Lenses/ci/10209/N/4036297804). So go get yourself a 70-200, 2.8 lense, up your ISO, set your shutter speed, and have fun!!
Scott-
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