I disagree djleli....first of all everybody relies on everybody...I mean Canna and Thuram will be nothing if they didnt have their flanks covered and vieira and emerson blocking our midfield...
Also a good goalkeeper isnt only good in shot stopping, reflexes, rush outs...etc, he also has to be a good communicator and guide the defence, because he can see the whole pitch. I think Buffon has a huge responsibility on his shoulders, especially that he is by most considered the best in the world