What sport? Lighting is not all the story. What shutter speed would you require? At what distance will you be from your subject(s)?
I am not a professional but I have shot volley-ball (VB) games when my wife or son are playing for the past 8 years. I try to shoot from the bench or from behind the 2nd referee, that is within less 10m from the players. I use lenses with focal lengths within 50-100 mm (not enough details when shooting shorter focal lengths and anything above 100mm is too long IMHO). My preference is for fast prime lenses (f1.8 or f1.4), setting up my camera (K-3) for continuous shooting (8.3 fps) and manual focus mode (MF). I obtained my best shots with Carl Zeiss 85mm f1.4, Pentax FA77mm f1.8, and Voigtlander Nokton 58mm f1.4 lenses. Basic post-processing is a must. In particular for orientation/rotation. My keeper rate is low: less than 5% are truly good shots. But my wife, my son and their friends are happy with my shots and their encouraging feedback keeps me going. (None of their friends take better shots...)
VB is a really fast sport and I cannot use a flash. I found that a fast prime operating in MF with pre-focus (based upon distance) works best for me.
I hope that the comment may help.
Last edited by hcc; 12-15-2015 at 12:21 AM.