You might also try panning, which is following the target with the camera. If you do it right, the target is sharp and foreground and background look like they are whizzing by, so you get a sense of speed. Panning works with a slower shutter speed, something like 1/30 or 1/60. The slow shutter speed helps a lot if you don't have a super-expensive lens, because you can shoot at something like f5.6 or f8, and still have a good exposure at lower ISOs.
Tv mode is probably a good mode for either Mattt's suggestion (fast shutter speed) or mine. That allows you to directly set the shutter speed with the e-dial, so you can quickly go from freezing motion to panning shots. If the light is not great, you may need to raise ISO, or use Auto ISO. I would use the center focus point only for AF, try and keep the target centered, and leave room for cropping later in processing. That saves the camera time in focusing and keeps it from focusing on something irrelevant.
If your target has a lot of solid reds or blues in bright sunlight, look at your RGB histogram to make sure those colors aren't getting completely over-exposed.
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