I was able to do that on default difficulty (semi-pro I think), but on pro and above it didn't seem to work. It seemed all my guys were too slow and too soft on marking.
I'll have to try more on pro. Maybe I just was worse on 14 than I remember (I swore I played WC). It was also 5am here when I was playing.
I always use the tele broadcast camera and it is hard to tell who is who.
Maybe you are too close to the ball carrier ? Allow a bit more space and it should abate their speed/manoeuvrability advantage since you have more time to react.