Yesterday I was out again, used mainly AF-S to set a focus point and then switched to MF on the DA*. It worked a charm but I can see on several images that the focus point is still behind what I focused on, as can be seen on the picture below, where I focused on the blue mat, yet the PoF is behind it.
I found out early, so I just worked around it, but had it been a more sporadic sport like soccer/football, I still have the feeling it wouldn't work well.
The few times I did try AF-C, it gave the same poor focus results, only nailing it on one image. I did however have sucess with panning shots using the catch-in-focus option + trailing curtain with flash on.
All in all a lot more manual work on my behalf but it worked out great
Still can't figure out if this is suppose to be normal behaviour or not.