>Vlad, > >... I looked at your shots in this >post, and I would be more concerned about focus than noise.
This is part and parcel of the problem. The shots were likely in focus. But the noise signature obscures fine edges and makes it seem like the subjects are slightly out of focus. High ISO also robs contrast and dynamic range.
When we add the required smoothing in post, it further blurs fine edges and makes the images seem like focus was missed. This is the bane of indoor sports photography. And it's why all the big boys strobe indoors. This is simply not possible in some instances and we battle the "is the focus out" questions all the time.