Grygera's amazing positional sense and defensive work:
http://www.youtube.com/watch?v=iMrbmDj5yTc - Start of video - Attacker touches the ball to his right, Grygera gives up, goal.
http://www.youtube.com/watch?v=hZJH0qLKS5A - 2:40 - Matri makes run. Grygera stops and leaves scene of the crime. Goal.
http://www.youtube.com/watch?v=cWOUOdWvJS8 - 0:22 - Shot, rebound. Grygera stops running. Pastore gets to the ball. Goal.
Same video. 1:10. Amazing positioning there.
Same video. 2:08. I won't fault him too much here but he turns away from the shot. Also, he's too slow to get out to the ball. I know Pepe would have done better there because of pace and aggressiveness.
http://www.youtube.com/watch?v=fN6mxKFmnUE - 1:25 - Truely LOL worthy. First he's not even in the picture as his man storms in on goal. Secondly watch his amazing positional sense as he literally STANDS there while the opponent scores.
And I didn't include 2 instances of him letting his man cross for goals because that happens to lots of fullbacks. But it's another example of how little impact he makes.
It took me 10 minutes to find this stuff from just his 7 starts this season. This is exactly what I'm talking about when I say he hides from making an impact. He literally will just stand there half the time. At least run Zdynek!