The Toronto Raptors are shooting 35.6 percent from beyond the arc and 80.1 percent from the free throw line.
Dunn gave his conditioning "about a C-plus", which was what he expected in his first game since January 17.
The Raptors continued to pull away in the third. The Heat have lost a season-worst four straight on the road. The Raptors have won five straight, seven-of-eight, and sit atop the Eastern Conference standings.
"Closing out games has been an issue for us", Casey said.
The Raptors' OG Anunoby (ankle) is questionable for the contest. He was injured in the first half at Charlotte and did not return for the second half.
Even so, Casey wasn't thrilled with Tuesday's effort. It was his third game since returning to the club in a trade with the Cleveland Cavaliers on February 8.
The Chicago Bulls could use a victory here after losing 11 of their last 17 games. The forward injured the shoulder in the first quarter against the Orlando Magic on February 5.
The second confrontation came after the final buzzer had sounded and it involved DeRozan and Goran Dragic; the two exchanged words (and shoves) and we're separated, both receiving fines from the National Basketball Association.
However, Tyler Johnson was the one who led the Heat to victory, recording 19 points, six rebounds, three assists and two steals. Jokic provided 23 points, 13 rebounds and 11 assists, while teammate Will Barton had 20 points.
The home team led for much of the night but the way they ended the game was a concern for Lowry too.
"We definitely understand where we are in the standings", Dwyane Wade said. "We could have closed out better, but we've got to fix it and continue to get better".
"It was great, man", Whiteside said.
"They just seemed to score every time down going the other way and we weren't able to hold the fort", Spoelstra said. It's a lot different when he's out there.
With the Raptors involved in so many blowouts this month, DeRozan hasn't been seeing as many minutes lately, but he finally cracked the 30 minute mark for the first time in five games.
Jonas Valanciunas added 14 points and nine rebounds to help the Raptors complete a four-game sweep against Chicago even though they only got seven points from four-time All-Star DeMar DeRozan.
"They are phenomenal", Lowry said Sunday after the second unit again played the entire fourth quarter. "We stopped executing, stopped moving, stopped cutting, stopped being strong with the ball".