No doubt about it, Fury is fast for a big man (6ft 9in) and his mobility over his opponent will be one of the key reasons he will beat Joshua.
If Joshua has a chance of winning he should forget about trying to box it to 12 rounds and win on points, the fight will be over long before that and if it did make it to 12 rounds he would not win on points. The only chance he has to win against Fury is to hope he can knock him out early on but the odds heavily favour Fury to win.
Lets imagine next will be Fury vs Joshua. What Joshua could do or have, that might give him advantage over Fury.
Fury is heavy, strong, can survive destructive punches from tops like Wilder, despite he is heavy - he is fast.
Joshua vs Ruiz showed that Joshuas defense is not perfect and 1 heavy punch can and the fight.
What Joshua should do to win Fury?