While I'm not one for caring about numbers, I like that Juve have given No. 10 to Tevez.
There would have been a danger if the player getting the shirt wasn't of such a stature that it could have weighed them down and adversely affected their performance, but I wouldn't exepct that to happen with Tevez.
Tevez having the shirt for a couple of years will also make it a slightly less imposing shirt to wear for whoever takes it after him.