Hayward went blow for blow with LeBron James in the second half to help Utah beat the defending champion Cleveland Cavaliers 100-92.
Hayward scored 28 points and went back and forth with the four-time MVP during a decisive third quarter. James brought the Cavs back from a 15-point halftime deficit before Hayward drove the lead back to 14.
"His level being so high consistently is what's separating him right now," Jazz coach Quin Snyder said. "He had big games last year at various times last year. But he's up at that level more for longer periods during the game.
"That's the next level that he found tonight, understanding how to attack a defense. Not just how to attack one guy."
Hayward had 11 points while the Jazz used a 16-0 run midway through the quarter to lead 74-60. The Cavs had a 17-0 roll after halftime thanks to an aggressive James and his 13 third-quarter points.
Trey Lyles had eight straight points, including a pair of 3-pointers, in the fourth quarter to help the Jazz hold on.
"Studying the film, doing some extra work before the games has helped me out, and after the games," Hayward said. "Stuff that I didn't used to do. The little things like that have definitely transferred over.
"Going over matchups, going over how guys defend, how teams defend, what I can do better from the last time we played them. Different things like that."
James finished with 29 points and Kyrie Irving added 20 for the defending champs.
The Jazz led 56-41 at halftime after closing the second quarter on a 10-0 run highlighted by Hayward's alley-oop and 3-pointers from George Hill and Rodney Hood. Utah dominated the second quarter 27-12 while shooting 50 percent in the first half. Cleveland's 12 points were a team season-low for a quarter
"When we got down so much, we had to play so hard to come back," Cavs coach Tyronn Lue said, adding "we used so much energy in the third quarter. We should have started the game that way."
Cavaliers: Cleveland is 8-3 against Western Conference opponents. ... The Cavs shot just 36.5 percent and 29.0 percent from behind the arc. ... James is 5-9 on the road against the Jazz. "I feel great in this arena all the time," James said. "You talk about the altitude. I don't really get that tired for some odd reason. I've had some pretty big quarters, but it's never on the winning side."
Jazz: Rudy Gobert posted his franchise-best 25th consecutive game with 10-plus rebounds (14). He added 11 points for his 27th double-double this season. ... Hood scored 18.
Kyle Korver made his first appearance with the Cavs after being traded in a deal that sent Mike Dunleavy, Mo Williams, a protected first-round pick and cash to the Hawks. He scored two points and grabbed three rebounds in 17 minutes.
"I've always felt the better the players are around me, the better I can be," Korver said. "And this is the most talented team I've ever been on."
The suddenly healthy Jazz started Hill, Hood, Hayward, Derrick Favors and Gobert for just the sixth time this season. The Jazz are now 5-1 when that unit starts.
"It's different, that's for sure," Snyder said about having the full roster available. "I hesitate to say it's more challenging. It's different for the players, too. We'll have to find out more about ourselves and guys individually and how they play together."
"First thing I told him when he walked in the locker room the other day was, 'If you want to fit in, shoot the ball every time you get it,'" James said of Korver. "'Soon as it touches your hand, shoot it. We don't care.'
"We've got about four guys who have the ultra-green light. J.R. (Smith), Kev (Love), now Kyle, Channing (Frye) and Champ (James Jones). And then you've got green lights for Kyrie. Then you have like a flashing light for myself. I've got to make sure I get everybody involved so I can decide if I want to stop at the light or I can just cruise through there. So, the fluorescent light guys, they can do whatever they want. They have no other responsibilities besides let it go."
Cavaliers: Travel Wednesday night to face a struggling Portland Trail Blazers team that had lost seven of 10 entering Tuesday night.
Jazz: Host Andre Drummond and the Detroit Pistons on Friday night in a matchup between two of the league's best centers.
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