The Celtics were playing whatever team Chamberlain was on (I’m guessing the Warriors) and some young guard started mouthing off at Wilt. Russell quickly took the kid aside and said: “Shut up. If you leave him alone, he’ll go for 35 or 40 and we’ll win. If you make him mad, he’ll go for 70 and he’ll be a bear on defense, and we could lose”. The rookie shut up.
No idea f it’s true, but it summed up Russell’s respect for how good Wilt could be.