Grant's role is to be the enforcer; he is heavier and taller than Pippen and Buck, which plays an important role in stopping Ah Gan's big strides down the middle.
In practice, Jackson had Pippen simulate Ah Gan carrying the ball from the backcourt across the entire court.
As a result, Jordan and Grant were always able to stop Pippen near mid-court, forcing him to pass the ball or even lose it.
"No, Scottie's dribbling skills aren't good enough. He can't protect the ball. Ah Gan wouldn't easily stop dribbling or pass."
After several successful defenses, Jordan complained that if they could achieve this effect during the game, they wouldn't have lost the third and fourth games.
"Then you might as well invite Ah Gan over to be our sparring partner." Pippen also complained.
Pippen made great sacrifices in figuring out how to deal with Ah Gan.
In the third and fourth games, he got beaten up badly, and it still had no effect.
Jordan's comment made him feel a bit uncomfortable.