Originally posted by Eulogy Right, I'm pretty sure.
Correct. '+' will help fix back-focusing; '-' helps fix front-focusing.
But if you're not using the selectable or center AF point and tracking the subject with it, how do you know this is the problem? It could just be selecting the background automatically, if you let the camera choose.
Perhaps the back-focus isn't by that much, which you can clearly see and I can't. But if the background is in focus it's likely much more than a minor AF adjustment issue. And if this isn't the case, I still think you must select the AF point yourself in order to get effective shots, especially if the aperture is near wide open, which is usually desirable and even necessary for a night game.