It’s always nice to watch guys at the game of their game, as Pollack and Hoffman were in Tootsie. Sure, they might have wanted to strangle each other but the payoff was sweet for us.
Like in these two scenes:
From Pauline Kael’s review:
…When Hoffman delivers the kind of performance he gives here, the talk in the media about his being overpaid seems beside the point. The movie is inconcievable without him. Once Hoffman was committed to the project, the scriptwriters began to shape the central character to fit him, and then they went further. In its final form, Tootsie is based on Dustin Hoffman, the perfectionist; he’s both the hero and the target of this satirical farce about actors.
…Sydney Pollack, who was an actor in his earlier years, originally went to Hollywood (in 1961) as a dialogue coach for John Frankenheimer; essentially he’s still a dialogue coach, and this works better for him here than it ever has before. Having dealt with stars most of his life, he knows how impossible they can be, and he has been able to make Tootsie something practically unheard of: a believable farce. The picture has more energy than anything else he has done; it’s almost alarmingly well cast, and the lines of dialogue collide with a click and go spinning off. Pollack himself gives some jabbing, fast readings; he plays a major role–that of Michael’s agent–with zest.
And here's more, an interview with Hoffman from American Film: