Ufc Undisputed: ground game

[Sturae229]

Hi all
Iv been playing this quite a bit online recently and find that my opponenets keep getting into the mount position and basically smash my head in and i can neither defend or get out of this position. any help anyone??
i apologise if i have out this in wrong section
thanks

[Salsa Party Animal]

rotate right stick I think and left Top button I think (Not played it for 2 weeks)