Anyway, I doubt the Granit can be chased. MiG-31, in spite of its tremendous speed was designed with Tomahawks in mind. The only scenario I can imegine a Granit can be chased is to place the Foxound just in the same place and the same time the Granit breaks from water (and I even doubt the Foxhound can follow the missile for long time). If you consider some initial time/distance miss, the missile is gone.

You have it merge like the F-15 did with the Tomahawk. Maybe that happens at Mach 2.5 and 40,000 feet. Anyway it was just a thought.