Zion Williamson's 15-point third quarter in Monday's shock win over the Utah Jazz was "incredible" according to New Orleans Pelicans head coach Stan Van Gundy, who again called on the referees to give him more protection.

The former number one draft pick was integral to the Pelicans' 129-124 victory over the Western Conference leaders, finishing with a double-double of 26 points and 10 rebounds to go with five assists.

Utah pulled to within one point with 45 seconds to go before Williamson was ice cool with two free-throws.

The Pelicans got the jump in the third, when they outscored Utah 40-24 and opened up an 11-point buffer at the last change, led by Williamson with his second most prolific quarter in his NBA career to date.

"The third quarter was incredible," Van Gundy told reporters about 20-year-old Williamson post-game.

"They did a much better job on him in the fourth. In the third quarter he was overwhelming."

The Pelicans improved to a 15-19 record with the win to stay in the playoffs hunt and Williamson said it was all about their "want".

"We've found ourselves in situations like this all the time," Williamson told Fox post-game after trailing by five at half-time.

"It's a matter of want. Tonight we wanted it more. We came out with better energy in the third and got the win."

Meanwhile, Van Gundy once again lamented the lack of calls that Williamson was receiving from the officials, having made the same point after their loss to the Milwaukee Bucks recently.

"Some day he's going to start to get the calls he deserves to get," the Pelicans coach said.

"Any game he's not shooting 10 free-throws or more, I'm guaranteeing they're missing some calls."