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There are court sports and field sports. There is indoor sports and outdoor sports.
Court sport are usually played inside, and field sports are usually played outside.
It all boils down to making sure you have enough shutter speed to stop the sports action.
Indoor court sports and night time outdoor field sports almost always have insufficient, or barely enough lighting for photography, and require both fast lenses and cameras that have really good ISO performance.
Daytime court and field sports usually have more than enough light and less expensive slower lenses and less expensive cameras with less ISO perfomance can be used.
Field sports require more telephoto reach than courts sports. To cover both near and far action, field sports focal length range basically needs to be from 24 mm or so to 400 mm or so.
To cover both near and far action, Court sports focal length range basically needs to be from 24 mm or so to 300 mm or so.
To cover that wide a range of focal lengths requires multiple lenses. However, there is insufficient time for changing lenses. So sports photographers usually use multiple camera bodies that have the needed lenses already mounted.
I shot sports using 3 bodies - 2 FX bodies (full frame) and 1 DX body (crop sensor).
For field sports I used a 24-85 mm f/2.8-4 lens, an 80-200 mm f/2.8 lens, and on the DX body a 200-400 mm f/4 lens.
For court sports I substituted the 200-400 mm f/4 with a 300 mm f/2.8 and the 300mm was mounted on a DX body.