Answer already provided.
Why do you refuse to answer my question? Is it because you know that Djokovic's 2011 season is better than Sampras's 1994 but do not want to admit it?
Djokovic's 2011 was not a great whole season since he crashed in the fall, so he was basically on a hot streak for a few months.
Sampras has multiple slams seasons 4 times and won a slam in 8 consecutive seasons. What about Nole?
Nole is not in the same league as Sampras. Again, this is common sense.