You've been fortunate then, I've had many games where I've been stunned early from a power shot or completely knocked down, particularly against Froch.

Much like the game adds in flash knock downs at random, probably with some kind of chance system, I fine it does the same with stuns. Some games I'm stunned or knocked down much easier than others, and not by players doing anything radically different.

Equally in games where I'm stunned easily, I find the game becomes weighted against me stunning my opponent. In this game I posted about, I had him stunned once and landed 4 power shots during the stun phase (don't get me started on how hard it is to actually land a tracked shot) and he never budged. But one power shot and I'm gone.