Who was McEnroe playing when he shouted the classic line "You cannot be serious!"?

Question

Who was McEnroe playing when he shouted the classic line "You cannot be serious!"?

Answer 1

His opponent was Tom Gullikson, the umpire he shouted at was Edward James.

Answer 2

not sure, but here was the draw:

http://en.wikipedia.org/wiki/1981_Wimble...

so, per response below, that would've been in the first round. kind of set the tone for the rest of the tournament.

i miss those entertaining days. wish we had another mcenroe in the game today.