An example of this would be the view of the referee. However, the greater the shutter speed the more light is needed, and again for fencing there is usually not much. Also, if you use any type of telephoto, a 250 or above shutter speed is needed to avoid camera shake which can blur your photo. Pratice this article. The next step after dealing with low lighting is to consider composition.
Composition is just a general term for what's in the photograph.
This is the creative part of photography and there are volumes written on the subject. For fencing, four tips on this subject can help. First, for action shots try and center the photograph equally between the two fencers and position oneself and the camera so that most of both fencers will be captured in the shot when one attacks. However, do not stay too far back. Tightly cropped action without a lot of background looks better.