I can understand the excuse of being marked closely in the box. Well, yes, that's because the guy is like 6'4 and has a history of scoring many goals with his head. But he has always been marked, so nothing has changed for him. Its not like the quality of defending suddenly took a major dip in quality since last year. Its pretty much the same defenders.
Second, if I was the opposition coach I'd simply have one player mark him closely when Juve look to play the ball into his feet. As soon as the ball is play get right on him and its almost certain in this form he will make a mistake or at least make a meal of it. There are more players marking Tevez but he drops so far back to get the ball, Llorente is on his own anyways up front .
As a defender, Llorente is the kind of striker I absolutely love to come up against. Predictable. Awkward.
Intelligent strikers like Inzaghi was are annoying to mark because they are always 1 step ahead of you mentally and on the pitch. Then there are strikers like Tevez who are tenacious and all over the place with quality on the ball. Dzeko as well, strikers like that can have a go just about anywhere inside the box or outside and that makes them harder to predict. I have yet to see Llorente take a shot outside the 18 yard box.
The gift of a player like Llorente is that his physique allows him to do as he pleases in many cases, even when he is being marked. He doesn't have to out-think or trick his way past a marker - he can just plain bully him.
That means he is very dangerous if marked one-on-one.
Or, if a team focuses more than one player on him, he is creating more space for other players.
We all so how effective he could be last season.
We can all see that his form is not good this season, though I believe the game against Roma was his first genuinely poor performance. He'd made decent contributions in the other games, but he did little beyond disputing Juve's play against Roma.
My main complaint of Llorente this season is one that I don't think I've seen anyone else make, for all the complaints there have been about him this season: he is simply not moving well enough in the box. He is spending too much time waiting at the back post and behind defenders instead of trying to go and attack the ball and get in front of his marker.
Big players score a lot of goals by waiting for high balls to the back post, but you still have to vary your movement so as to avoid becoming too predictable and easy to mark.