The Celtics and Bulls may be engaged in an intense first-round matchup but don't tell Robin Lopez about it.

During the third quarter of Game 4, Lopez rather amusingly, noticed that Jae Crowder‘s shoe was untied, so the Bulls big man tied it for him:

NBA mascots may think Lopez is a bully, but clearly he is a nice guy and is willing to lend a helping hand, even when it involves a playoff opponent.