Watch: Robin Lopez unties Jae Crowder's laces in shoe battle

Robin Lopez got his J.R. Smith on in Sunday's game.

The Chicago Bulls center lost a shoe, and as he tried to pick it up, Boston Celtics small forward Jae Crowder tossed it further away. An official stopped the game, giving RoLo time to retrieve his sneaker - and untie Crowder's shoe.

That scene was reminiscent of Smith's old habit of untying opponents' kicks during free throws - which he eventually stopped doing after he was slapped with a $50,000 fine in 2014.

Perhaps with that in mind, Lopez re-tied Crowder's laces.

Crowder was whistled for a delay-of-game violation.