The brain doesn't process vision anywhere near fast enough for some of the stuff you see in fast sporting actions if it were purely reactive - batting in baseball/cricket, returning a table-tennis shot, etc. In some cases the time available for movement is extremely restricted and yet people can respond accurately. We may not know exactly how the brain implements it, but it clearly uses prediction to estimate where the object is going to be - i.e. it is, in some sense, modelling its trajectory.